Form Not Allowing Files to Be Uploaded

I received a report that this form:  https://form.jotform.com/62005412646144 is not allowing files to be uploaded. Just saying wrong file type but no file type seems to be right. 

Jon

I cloned your form to test it and was unable to reproduce this issue.  I was able to upload image files  to the widget and no error was given:

The image upload preview widget does require image files to be submitted.  If you require files other than images, it would require using a regular file upload field.