Why can`t I upload files to the form?

I need to fill the application for my scholarship on this website but it gives me this error every time I try to submit.

Apologize for the inconvenience this may have caused.

Please note that JotForm is an online form builder. JotForm FAQ

The form you are trying to submit was created by one of our users. You can open the session link you received via email, reupload all files and try to submit it again. You can also report the issue to the form owner.