@bender-tags: 4.19.0, bug, 5095
@bender-ui: collapsed
@bender-ckeditor-plugins: wysiwygarea, toolbar, uploadwidget, floatingspace, toolbar, sourcearea

1. Drag and drop file without extension. [logo](../_assets/logo) into the editor.

**Expected** Notification with "The file format is not supported." message is displayed.

**Unexpected** Nothing happens.

2. Repeat step `1` for the paste method.
