diff --git a/frontend/src/components/UsingQueryResult.vue b/frontend/src/components/UsingQueryResult.vue
index 27271184..045ff62a 100644
--- a/frontend/src/components/UsingQueryResult.vue
+++ b/frontend/src/components/UsingQueryResult.vue
@@ -27,7 +27,7 @@
     <div v-if="isError">
         <v-empty-state
             icon="mdi-alert-circle-outline"
-            :text="errorMessage"
+            :text="t(errorMessage)"
             :title="t('error_title')"
         ></v-empty-state>
     </div>
diff --git a/frontend/src/controllers/learning-paths.ts b/frontend/src/controllers/learning-paths.ts
index 4a8a1824..bf0d3354 100644
--- a/frontend/src/controllers/learning-paths.ts
+++ b/frontend/src/controllers/learning-paths.ts
@@ -1,7 +1,7 @@
 import { BaseController } from "@/controllers/base-controller.ts";
 import type { Language } from "@/data-objects/language.ts";
 import { LearningPath } from "@/data-objects/learning-paths/learning-path";
-import { single } from "@/utils/response-assertions.ts";
+import { NotFoundException } from "@/exception/not-found-exception";
 import type { LearningPath as LearningPathDTO } from "@dwengo-1/common/interfaces/learning-content";
 
 export class LearningPathController extends BaseController {
@@ -24,7 +24,10 @@ export class LearningPathController extends BaseController {
             assignmentNo: forGroup?.assignmentNo,
             classId: forGroup?.classId,
         });
-        return LearningPath.fromDTO(single(dtos));
+        if (dtos.length === 0) {
+            throw new NotFoundException('learningPathNotFound')
+        }
+        return LearningPath.fromDTO(dtos[0]);
     }
     async getAllByTheme(theme: string): Promise<LearningPath[]> {
         const dtos = await this.get<LearningPathDTO[]>("/", { theme });
diff --git a/frontend/src/data-objects/learning-paths/learning-path.ts b/frontend/src/data-objects/learning-paths/learning-path.ts
index 6346fa09..880aad85 100644
--- a/frontend/src/data-objects/learning-paths/learning-path.ts
+++ b/frontend/src/data-objects/learning-paths/learning-path.ts
@@ -93,7 +93,10 @@ export class LearningPath {
         const startNodeDtos = dto.nodes.filter((it) => it.start_node === true);
         if (startNodeDtos.length < 1) {
             // The learning path has no starting node -> use the first node.
-            return dto.nodes[0];
+            if (dto.nodes.length > 0) {
+                return dto.nodes[0];
+            }
+            throw new Error("emptyLearningPath");
         } // The learning path has 1 or more starting nodes -> use the first start node.
         return startNodeDtos[0];
     }
diff --git a/frontend/src/i18n/locale/de.json b/frontend/src/i18n/locale/de.json
index b2c03520..b00938db 100644
--- a/frontend/src/i18n/locale/de.json
+++ b/frontend/src/i18n/locale/de.json
@@ -160,5 +160,7 @@
     "learningPathCantModifyId": "Der HRUID oder die Sprache eines Lernpfads kann nicht geändert werden.",
     "error": "Fehler",
     "ownLearningContentTitle": "Eigene Lerninhalte",
-    "ownLearningContentDescription": "Erstellen und verwalten Sie eigene Lernobjekte und Lernpfade. Nur für fortgeschrittene Nutzer."
+    "ownLearningContentDescription": "Erstellen und verwalten Sie eigene Lernobjekte und Lernpfade. Nur für fortgeschrittene Nutzer.",
+    "learningPathNotFound": "Dieser Lernpfad konnte nicht gefunden werden.",
+    "emptyLearningPath": "Dieser Lernpfad enthält keine Lernobjekte."
 }
diff --git a/frontend/src/i18n/locale/en.json b/frontend/src/i18n/locale/en.json
index 5ed93799..76082487 100644
--- a/frontend/src/i18n/locale/en.json
+++ b/frontend/src/i18n/locale/en.json
@@ -160,5 +160,7 @@
     "learningPathCantModifyId": "The HRUID or language of a learning path cannot be modified.",
     "error": "Error",
     "ownLearningContentTitle": "Own learning content",
-    "ownLearningContentDescription": "Create and administrate your own learning objects and learning paths. For advanced users only."
+    "ownLearningContentDescription": "Create and administrate your own learning objects and learning paths. For advanced users only.",
+    "learningPathNotFound": "This learning path could not be found.",
+    "emptyLearningPath": "This learning path does not contain any learning objects."
 }
diff --git a/frontend/src/i18n/locale/fr.json b/frontend/src/i18n/locale/fr.json
index fd4840fc..e2e2a094 100644
--- a/frontend/src/i18n/locale/fr.json
+++ b/frontend/src/i18n/locale/fr.json
@@ -161,5 +161,7 @@
     "learningPathCantModifyId": "Le HRUID ou la langue d’un parcours ne peuvent pas être modifiés.",
     "error": "Erreur",
     "ownLearningContentTitle": "Contenu d’apprentissage personnel",
-    "ownLearningContentDescription": "Créez et gérez vos propres objets et parcours d’apprentissage. Réservé aux utilisateurs avancés."
+    "ownLearningContentDescription": "Créez et gérez vos propres objets et parcours d’apprentissage. Réservé aux utilisateurs avancés.",
+    "learningPathNotFound": "Ce parcours d'apprentissage est introuvable.",
+    "emptyLearningPath": "Ce parcours d'apprentissage ne contient aucun objet d'apprentissage."
 }
diff --git a/frontend/src/i18n/locale/nl.json b/frontend/src/i18n/locale/nl.json
index b12bbf77..3bfacea7 100644
--- a/frontend/src/i18n/locale/nl.json
+++ b/frontend/src/i18n/locale/nl.json
@@ -160,5 +160,7 @@
     "learningPathCantModifyId": "De HRUID of taal van een leerpad kan niet worden gewijzigd.",
     "error": "Fout",
     "ownLearningContentTitle": "Eigen leerinhoud",
-    "ownLearningContentDescription": "Maak en beheer je eigen leerobjecten en leerpads. Alleen voor gevorderde gebruikers."
+    "ownLearningContentDescription": "Maak en beheer je eigen leerobjecten en leerpads. Alleen voor gevorderde gebruikers.",
+    "learningPathNotFound": "Dit leerpad kon niet gevonden worden.",
+    "emptyLearningPath": "Dit leerpad bevat geen leerobjecten."
 }