Offline Payment Option Throws Error

I installed and configured JoomDonation and when testing I choose Offline Donation and click "process donation" button on the form I get this error, "TCPDF ERROR: Please explicitly set action attribute path!"

Is there some configuration I'm missing? Is this related to the other issue I asked about where amount shows $0 for all options? Thanks.

Hi Amber,
It seems the issue has cause from your layout of PDF invoice. Please submit ticket and send your site information with super admin account. We will check and solve the issue for you.
Thanks
Dam