I have completed and checked the return with all diagnostics corrected. After I create the return, I try to print a PDF version and I get a 500 Internal Server Error like the one shown below.
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Sun Feb 27 22:33:19 UTC 2022
There was an unexpected error (type=Internal Server Error, status=500).