package.json

 {
   "name": "ui",
-  "version": "2.3.0",
+  "version": "2.4.0",
   "private": true,
   "scripts": {
     "dev": "vite",

src/modules/resource/components/resource-page/MetadataManager.vue

@@ -297,6 +297,13 @@ export default defineComponent({
       return this.shownFiles[this.currentFileId];
     },
 
+    isEntryNameUrlSafe(): boolean {
+      return (
+        this.currentFolderContent === undefined ||
+        !/[\\:?*<>|]+/g.test(this.currentFolderContent.name)
+      );
+    },
+
     currentMetadata(): Dataset | null {
       if (
         this.currentFileId >= 0 &&
@@ -346,6 +353,7 @@ export default defineComponent({
     saveButtonDisabled(): boolean {
       return (
         (this.resource && this.resource.archived) ||
+        !this.isEntryNameUrlSafe ||
         !this.valid ||
         this.isUploading ||
         (this.currentFolderContent?.isFolder === false &&

src/modules/resource/components/resource-page/metadata/MetadataManagerSpecialProperties.vue

@@ -31,6 +31,11 @@
         :label="$t('page.resource.metadataKey')"
         :is-loading="showDetail && !currentFolderContent.name"
       >
+        <template v-if="!isEntryNameUrlSafe" #hint>
+          <span class="text-danger">{{
+            $t("page.resource.urlSafeEntryNameHint")
+          }}</span>
+        </template>
         <b-form-input
           :value="currentFolderContent.name"
           :placeholder="$t('page.resource.metadataKey')"
@@ -112,6 +117,9 @@ export default defineComponent({
     isGuest(): boolean | undefined {
       return this.projectStore.currentUserRoleIsGuest;
     },
+    isEntryNameUrlSafe(): boolean {
+      return !/[\\:?*<>|]+/g.test(this.currentFolderContent.name);
+    },
   },
   methods: {
     openURL() {

src/modules/resource/i18n/de.ts

@@ -194,6 +194,8 @@ export default {
       dataUrl: "Daten URL",
       metadataKey: "Eintragsname",
       size: "Dateigröße",
+      urlSafeEntryNameHint:
+        "Die folgenden Zeichen können nicht für den Eintragsnamen verwendet werden: \\ : ? * < > |",
     },
     settings: {
       title: "@:(breadcrumbs.resource.settings)",

src/modules/resource/i18n/en.ts

@@ -190,6 +190,8 @@ export default {
       dataUrl: "Data URL",
       metadataKey: "Entry Name",
       size: "File Size",
+      urlSafeEntryNameHint:
+        "The following characters cannot be used for the Entry Name: \\ : ? * < > |",
     },
     settings: {
       title: "@:(breadcrumbs.resource.settings)",