This issue report ties to this one of yours: https://forum2.seatable.io/t/internal-server-error-attempting-to-create-2-pdfs-with-1-button-click/1681
Your assumption is correct:
The issue will be solved in the next release in some weeks from now.
Do it like thousands of other people who have used SeaTable to develop powerful processes and get their ideas and tasks done more efficiently.