Hi, We are sorry for the inconvenience caused to you.
Kindly log out of the Jotform app and log back in then try downloading the PDF once again.
If the issue still persists, please let us know the form URL, your mobile info and a screenshot of the console displaying the error message. If you can manage to create a short video and upload it on Google Drive and share its link here, it will help us troubleshoot this problem further.
We are waiting for your response on our forum, so just let us know