I can't use my form anymore

It opens up like It will work but then it doesn't let me save or preview the filled form. Help!

Hi,

We do apologize for the inconvenience.

I was able to replicate the issue when I preview the form. 

I've checked your form, and it seems that the PDF has failed to load. As what is shown in the image below, please reupload your PDF file and try again.

If the issue still persists please do let us know so we can further check.