The same on my Ufs912. I guess start routine from DuckBA (99% Used from Ufs912 User) is different to the old Maxiboot Tool. Hopefully Audioniek can provide patched .tar.gz Image which fits with the Multiboot DuckBA ( also implemented in MorlyTool)
Update to Ufs912 Flash Image - It works so far - nice to have a new E2 Image since long time ago