diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index ac72c34..3fa8f86 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/installAndRun.sh b/installAndRun.sh
index 09a15ae..3baaa09 100755
--- a/installAndRun.sh
+++ b/installAndRun.sh
@@ -22,7 +22,7 @@ elif [[ $# -gt 2 ]]; then
 	echo -e "Wrong number of arguments given: ${#} (more than 2)\nPlease execute it like: script.sh <justRun: 0 | 1> <avoidReInstallingPublicationsRetriever: 0 | 1>";	exit 2
 fi
 
-gradleVersion="8.3"
+gradleVersion="8.4"
 
 shouldBeCarefulWithMaxHeap=0 # This is NOT a cmd-arg.
 
diff --git a/src/main/java/eu/openaire/urls_worker/controllers/GeneralController.java b/src/main/java/eu/openaire/urls_worker/controllers/GeneralController.java
index 245d7e7..dfdbb38 100644
--- a/src/main/java/eu/openaire/urls_worker/controllers/GeneralController.java
+++ b/src/main/java/eu/openaire/urls_worker/controllers/GeneralController.java
@@ -102,8 +102,9 @@ public class GeneralController {
     public ResponseEntity<?> addReportResultToWorker(@PathVariable long assignmentsCounter, @RequestBody(required=false) String errorMsg)
     {
         if ( ! AssignmentsHandler.handledAssignmentsCounters.contains(assignmentsCounter) ) {
-            logger.error("The \"addReportResultToWorker\"-endpoint was called for an unknown \"assignmentsCounter\": " + assignmentsCounter);
-            return ResponseEntity.notFound().build();
+            errorMsg = "The \"addReportResultToWorker\"-endpoint was called for an unknown \"assignmentsCounter\": " + assignmentsCounter;
+            logger.error(errorMsg);
+            return ResponseEntity.status(HttpStatus.NOT_FOUND).body(errorMsg);
         }
 
         if ( errorMsg == null ) {