Penpot from Figma - importer troubles: how to troubleshoot?

I used the Penpot exporter for Figma to export Figma files. A large percentage of the resulting ZIP files do not import to Penpot. The importer fails with

How can I determine what is causing the imports to fail?

Hello @NickyDoes, unfortunately the Figma exporter has issue with big files, we are working on solving this issue