diff --git a/frontend/src/pages/Cache.vue b/frontend/src/pages/Cache.vue
index 0c688b9..fd18a6f 100644
--- a/frontend/src/pages/Cache.vue
+++ b/frontend/src/pages/Cache.vue
@@ -199,21 +199,16 @@
               this.$store.commit('cacheCollector/RESET_NEW_CACHE');
               this.$router.push({path: '/overview'});
             }).catch((error) => {
-            //TODO: Fehlermeldungen
-            // Error
             let msg;
             let title;
             if (error.response) {
-              // The request was made and the server responded with a status code
-              title = "Problem with response!";
-              msg = error.response;
+              title = "Bitte Eingaben überprüfen!";
+              msg = error.response.data;
             } else if (error.request) {
-              // The request was made but no response was received
-              title = "Problem with request!";
-              msg = "Error occured due to wrong server request!"
+              title = "Verbindungsfehler!";
+              msg = "Es konnte keine Verbindung zum Server aufgebaut werden. Versuchen Sie es später noch einmal!"
               console.log(error.request);
             } else {
-              // Something happened in setting up the request that triggered an Error
               title = "Error";
               msg = error.message;
               console.log('Error', error.message);
@@ -227,7 +222,24 @@
               console.log("POST api/editCache: " + response.statusText);
               this.$store.commit('cacheCollector/RESET_NEW_CACHE');
               this.$router.push({path: '/overview'});
-            })
+            }).catch((error) => {
+            let msg;
+            let title;
+            if (error.response) {
+              title = "Bitte Eingaben überprüfen!";
+              msg = error.response.data;
+            } else if (error.request) {
+              title = "Verbindungsfehler!";
+              msg = "Es konnte keine Verbindung zum Server aufgebaut werden. Versuchen Sie es später noch einmal!"
+              console.log(error.request);
+            } else {
+              title = "Error";
+              msg = error.message;
+              console.log('Error', error.message);
+            }
+            console.log(error.config);
+            this.$store.commit('dialog/NEW_MESSAGE_DIALOG', {message: msg, title: title,});
+          })
         }
       },
     },
diff --git a/frontend/src/pages/Login.vue b/frontend/src/pages/Login.vue
index ec2a41d..ebf4457 100644
--- a/frontend/src/pages/Login.vue
+++ b/frontend/src/pages/Login.vue
@@ -109,29 +109,24 @@
             localStorage.setItem('userMail', JSON.stringify(data.email));
             this.evalAuthentication();
             this.$router.push({path: `/overview`})
-          })
-          .catch((error) => {
-            let message;
-            let header = "Fehler: ";
-            if (error.response) {
-              console.log("ERROR RESPONSE");
-              // The request was made and the server responded with a status code
-              // that falls out of the range of 2xx
-              message = error.response.data.error;
-              header += error.response.status;
-            } else if (error.request) {
-              // The request was made but no response was received
-              // `error.request` is an instance of XMLHttpRequest in the browser and an instance of
-              // http.ClientRequest in node.js
-              message = "Anfrage fehlgeschlagen.";
-            } else {
-              // Something happened in setting up the request that triggered an Error
-              console.log('Error', error.message);
-              message = error.message;
-            }
-            console.log(error.config);
-            this.$store.commit('dialog/NEW_MESSAGE_DIALOG', { message: message, title: header, });
-          }).finally(() => {
+          }).catch((error) => {
+          let msg;
+          let title;
+          if (error.response) {
+            title = "Fehler!";
+            msg = error.response.data;
+          } else if (error.request) {
+            title = "Verbindungsfehler!";
+            msg = "Es konnte keine Verbindung zum Server aufgebaut werden. Versuchen Sie es später noch einmal!"
+            console.log(error.request);
+          } else {
+            title = "Error";
+            msg = error.message;
+            console.log('Error', error.message);
+          }
+          console.log(error.config);
+          this.$store.commit('dialog/NEW_MESSAGE_DIALOG', {message: msg, title: title,});
+        }).finally(() => {
             this.loading = false;
             this.evalAuthentication();
         })
diff --git a/frontend/src/pages/Overview.vue b/frontend/src/pages/Overview.vue
index 196f1bb..03db3e3 100644
--- a/frontend/src/pages/Overview.vue
+++ b/frontend/src/pages/Overview.vue
@@ -165,26 +165,22 @@
               this.initMap();
               resolve(true);
             }).catch((error) => {
-            let message;
-            let header = "Fehler: ";
+            let msg;
+            let title;
             if (error.response) {
-              console.log("ERROR RESPONSE");
-              // The request was made and the server responded with a status code
-              // that falls out of the range of 2xx
-              message = error.response.data.error;
-              header += error.response.status;
+              title = "Bitte Eingaben überprüfen!";
+              msg = error.response.data;
             } else if (error.request) {
-              // The request was made but no response was received
-              // `error.request` is an instance of XMLHttpRequest in the browser and an instance of
-              // http.ClientRequest in node.js
-              message = "Anfrage fehlgeschlagen.";
+              title = "Verbindungsfehler!";
+              msg = "Es konnte keine Verbindung zum Server aufgebaut werden. Versuchen Sie es später noch einmal!"
+              console.log(error.request);
             } else {
-              // Something happened in setting up the request that triggered an Error
+              title = "Error";
+              msg = error.message;
               console.log('Error', error.message);
-              message = error.message;
             }
             console.log(error.config);
-            this.$store.commit('dialog/NEW_MESSAGE_DIALOG', {message: message, title: header,});
+            this.$store.commit('dialog/NEW_MESSAGE_DIALOG', {message: msg, title: title,});
             resolve(true);
           })
         })
@@ -258,26 +254,22 @@
           .then((response) => {
             this.loadData();
           }).catch((error) => {
-          let message;
-          let header = "Fehler: ";
+          let msg;
+          let title;
           if (error.response) {
-            console.log("ERROR RESPONSE");
-            // The request was made and the server responded with a status code
-            // that falls out of the range of 2xx
-            message = error.response.data.error;
-            header += error.response.status;
+            title = "Fehler!";
+            msg = error.response.data;
           } else if (error.request) {
-            // The request was made but no response was received
-            // `error.request` is an instance of XMLHttpRequest in the browser and an instance of
-            // http.ClientRequest in node.js
-            message = "Anfrage fehlgeschlagen.";
+            title = "Verbindungsfehler!";
+            msg = "Es konnte keine Verbindung zum Server aufgebaut werden. Versuchen Sie es später noch einmal!"
+            console.log(error.request);
           } else {
-            // Something happened in setting up the request that triggered an Error
+            title = "Error";
+            msg = error.message;
             console.log('Error', error.message);
-            message = error.message;
           }
           console.log(error.config);
-          this.$store.commit('dialog/NEW_MESSAGE_DIALOG', {message: message, title: header,});
+          this.$store.commit('dialog/NEW_MESSAGE_DIALOG', {message: msg, title: title,});
         })
       },
       startCache(cacheID) {
@@ -299,9 +291,24 @@
               console.log(response.data);
               currentStationID = response.data.aktuelleStation.id;
               this.$router.push({path: `/station/${cacheID}/${currentStationID}`});
-            })
-            .catch((error) => {
-            });
+            }).catch((error) => {
+            let msg;
+            let title;
+            if (error.response) {
+              title = "Fehler!";
+              msg = error.response.data;
+            } else if (error.request) {
+              title = "Verbindungsfehler!";
+              msg = "Es konnte keine Verbindung zum Server aufgebaut werden. Versuchen Sie es später noch einmal!"
+              console.log(error.request);
+            } else {
+              title = "Error";
+              msg = error.message;
+              console.log('Error', error.message);
+            }
+            console.log(error.config);
+            this.$store.commit('dialog/NEW_MESSAGE_DIALOG', {message: msg, title: title,});
+          })
         }
       },
       goToReward(cacheID) {
@@ -316,9 +323,24 @@
               console.log(response.data);
               currentStationID = response.data.aktuelleStation.id;
               this.$router.push({path: `/CacheEnd/${params.cacheID}`});
-            })
-            .catch((error) => {
-            });
+            }).catch((error) => {
+            let msg;
+            let title;
+            if (error.response) {
+              title = "Fehler!";
+              msg = error.response.data;
+            } else if (error.request) {
+              title = "Verbindungsfehler!";
+              msg = "Es konnte keine Verbindung zum Server aufgebaut werden. Versuchen Sie es später noch einmal!"
+              console.log(error.request);
+            } else {
+              title = "Error";
+              msg = error.message;
+              console.log('Error', error.message);
+            }
+            console.log(error.config);
+            this.$store.commit('dialog/NEW_MESSAGE_DIALOG', {message: msg, title: title,});
+          })
         }
       },
 
diff --git a/src/main/java/hhn/labsw/bugageocaching/controller/Controller.java b/src/main/java/hhn/labsw/bugageocaching/controller/Controller.java
index bc6afb0..4bbd3cf 100644
--- a/src/main/java/hhn/labsw/bugageocaching/controller/Controller.java
+++ b/src/main/java/hhn/labsw/bugageocaching/controller/Controller.java
@@ -1,6 +1,7 @@
 package hhn.labsw.bugageocaching.controller;
 
 import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
 import hhn.labsw.bugageocaching.entities.*;
 import hhn.labsw.bugageocaching.helper.POI;
 import hhn.labsw.bugageocaching.helper.RankingListHelper;
@@ -475,6 +476,7 @@ public class Controller {
       sendBackUsers.add(tmp);
     }
     logger.debug("/api/getRankingList Converted Objects to RankingListHelper");
+    logger.debug("/api/getRankingList RankingList: " + new GsonBuilder().setPrettyPrinting().create().toJson(sendBackUsers));
     return ResponseEntity.status(200).body(new Gson().toJson(sendBackUsers));
   }
 
diff --git a/src/main/java/hhn/labsw/bugageocaching/util/CacheConstructionUtil.java b/src/main/java/hhn/labsw/bugageocaching/util/CacheConstructionUtil.java
index f488eb6..43893f5 100644
--- a/src/main/java/hhn/labsw/bugageocaching/util/CacheConstructionUtil.java
+++ b/src/main/java/hhn/labsw/bugageocaching/util/CacheConstructionUtil.java
@@ -56,24 +56,24 @@ public class CacheConstructionUtil {
     // Caches werden in die Datenbank eingetragen
     if (cache.getDescription().length() == 0 || cache.getName().length() == 0 || cache.getRankingPoints() == 0.0) {
       deleteStationenUtil(cache);
-      return ResponseEntity.status(400).body("cache fields can´t be empty");
+      return ResponseEntity.status(400).body("Alle Felder müssen ausgefüllt werden!");
     }
 
     if (cache.getStationen().size() < 2) {
       deleteStationenUtil(cache);
-      return ResponseEntity.status(400).body("a cache needs atleast 2 stations");
+      return ResponseEntity.status(400).body("Ein Cache muss mindestens zwei Stationen besitzen.\nBitte füge noch eine Station hinzu!");
     }
 
     for (Cache cache1 : cacheRepository.findAll()) {
       if (cache1.getName().equals(cache.getName())) {
         deleteStationenUtil(cache);
-        return ResponseEntity.status(400).body("name is already taken");
+        return ResponseEntity.status(400).body("Der Cachename ist bereits vergeben. Bitte wähle einen anderen Name!");
       }
     }
 
     if (cache.getRankingPoints() < 0) {
       deleteStationenUtil(cache);
-      return ResponseEntity.status(400).body("Ranking points has to be a positive number");
+      return ResponseEntity.status(400).body("Die Punkte für den Cache dürfen nicht negativ sein!");
     }
 
     cacheRepository.save(cache);
@@ -84,15 +84,15 @@ public class CacheConstructionUtil {
   public static ResponseEntity createStationUtil(Station station) {
 
     if (station.getDescription().length() == 0 || station.getLattitude() == 0.0 || station.getLongitude() == 0.0 /*|| station.getSolution().length() == 0*/) {
-      return ResponseEntity.status(400).body("station fields can´t be empty");
+      return ResponseEntity.status(400).body("Alle Felder müssen ausgefüllt werden!");
     }
 
     if (station.getLattitude() < 9 || station.getLattitude() > 10) {
-      return ResponseEntity.status(400).body("Lattitude has to be between 9 and 10 degrees");
+      return ResponseEntity.status(400).body("Die Lattitude ist außerhalb der Bundesgartenschau");
     }
 
     if (station.getLongitude() < 49 || station.getLongitude() > 50) {
-      return ResponseEntity.status(400).body("Longitude has to be in the range of 49 to 50 degrees");
+      return ResponseEntity.status(400).body("Die Longitude ist außerhalb der Bundesgartenschau");
     }
 
     Random r = new Random();
@@ -114,7 +114,7 @@ public class CacheConstructionUtil {
     try {
       station.setCode(code);
     } catch (RollbackException e) {
-      return ResponseEntity.status(400).body("There was an error generating the unique code");
+      return ResponseEntity.status(400).body("Es gab einen Fehler beim Konsturieren der QR Codes");
     }
 
     stationRepository.save(station);
@@ -130,7 +130,7 @@ public class CacheConstructionUtil {
       oldCache = oldCacheOptional.get();
 //      oldStationen = new ArrayList<>(oldCache.getStationen());
     } else {
-      return ResponseEntity.status(404).body("There isnt a cache with the id " + cache.getId());
+      return ResponseEntity.status(404).body("Es gab einen Fehler. Bitte versuchen Sie es erneut oder kontaktieren Sie einen Admin.");
     }
 
     ResponseEntity response = new ResponseEntity(HttpStatus.ACCEPTED);
@@ -168,26 +168,26 @@ public class CacheConstructionUtil {
     // überprüft den Cache nach validen Daten
     if (cache.getDescription().length() == 0 || cache.getName().length() == 0 || cache.getRankingPoints() == 0.0) {
       deleteNewCreatedStationsUtil(newCreatedStationList);
-      return ResponseEntity.status(400).body("cache fields can´t be empty");
+      return ResponseEntity.status(400).body("Alle Felder müssen ausgefüllt sein!");
     }
 
     if (cache.getStationen().size() < 2) {
       deleteNewCreatedStationsUtil(newCreatedStationList);
-      return ResponseEntity.status(400).body("a cache needs atleast 2 stations");
+      return ResponseEntity.status(400).body("Ein Cache muss mindestens zwei Stationen haben. Bitte füge eine weiter Station hinzu!");
     }
 
     for (Cache cache1 : cacheRepository.findAll()) {
       if (cache1.getName().equals(cache.getName())) {
         if (cache1.getId() != oldCache.getId()) {
           deleteNewCreatedStationsUtil(newCreatedStationList);
-          return ResponseEntity.status(400).body("name is already taken");
+          return ResponseEntity.status(400).body("Der Cachename ist bereits vergeben. Bitte wähle einen anderen!");
         }
       }
     }
 
     if (cache.getRankingPoints() < 0) {
       deleteNewCreatedStationsUtil(newCreatedStationList);
-      return ResponseEntity.status(400).body("Ranking points has to be a positive number");
+      return ResponseEntity.status(400).body("Die Punkte für den Cache dürfen nicht negativ sein!");
     }
 
     cacheRepository.save(cache);
@@ -242,7 +242,7 @@ public class CacheConstructionUtil {
   public static ResponseEntity deleteCacheUtil(String cacheID) {
     Optional<Cache> optionalCache = cacheRepository.findById(Integer.valueOf(cacheID));
     if (!optionalCache.isPresent()) {
-      return ResponseEntity.status(404).body(new Gson().toJson("There is no cache with the ID " + cacheID));
+      return ResponseEntity.status(404).body(new Gson().toJson("Es gab einen Fehler beim Löschen des Caches"));
     }
 
     Cache cache = optionalCache.get();