Enhance showing errors.

sage_validation/file_validator/templates/upload.html

@@ -85,10 +85,10 @@
                         li.textContent = 'You are not authorized to perform this action.';
                         errorList.appendChild(li);
                     } else if (response.status === 400 && result.status === 'error') {
-                        for (const [field, messages] of Object.entries(result.errors)) {
+                        for (const messages of Object.values(result.errors)) {
                             messages.forEach(message => {
                                 const li = document.createElement('li');
-                                li.textContent = `${field}: ${message}`;
+                                li.textContent = message;
                                 errorList.appendChild(li);
                             });
                         }