Files in Darktable sent back to GIMP result in error message

RAW files opened in Darktable (5.4.1) via GIMP (3.2) can be processed, but when sent back to GIMP an error message results. The message says: “Opening (file name) failed: (NULL) plug-in could not open image.” Using OS: Windows 11.
Any suggestions what can be done to fix this? Thank you.

It was a bug that’s now fixed in master. You could try a nightly build or use the weekly build that I add in darktable windows insider program. It’s building now so give me a little bit.