Add check

packages/file-handling/src/clipboard.js

@@ -384,7 +384,7 @@ export class Clipboard extends ScopedElementsMixin(AdapterLitElement) {
      * @returns {boolean}
      */
     checkFileType(file) {
-        if (this.allowedMimeTypes === '') return true;
+        if (this.allowedMimeTypes === '' || !file.type) return true;
         // check if file is allowed
         const [fileMainType, fileSubType] = file.type.split('/');
         const mimeTypes = this.allowedMimeTypes.split(',');