@DesignM8. Thanks for posting. All you have to do is to use the mime type provided to you in the error message. So, please add “image/vnd.adobe.photoshop” to your list of permitted mime types.
I deliberately set the error message to list the detected mime type so that the user can see what mime type is being detected.
Hope this helps. If you need any further help, don’t hesitate to post again.