diff --git a/src/core/features/course/classes/main-resource-component.ts b/src/core/features/course/classes/main-resource-component.ts
index 24964fc75..625278153 100644
--- a/src/core/features/course/classes/main-resource-component.ts
+++ b/src/core/features/course/classes/main-resource-component.ts
@@ -295,7 +295,7 @@ export class CoreCourseModuleMainResourceComponent implements OnInit, OnDestroy,
                 error,
             ]);
         } else {
-            error = CoreTextUtils.getErrorMessageFromError(error) || error;
+            error = CoreTextUtils.getErrorMessageFromError(error) || '';
 
             return Translate.instant('core.errordownloadingsomefiles') + (error ? ' ' + error : '');
         }