Solution from there and what I also got from a microsoft ticket:Download the newest Win 11 ISO from MSDN/wherever.Download the newest 21H2 from MSDN/wherever.Take these files from the 21H2 ISO source folder and replace them in the newest Win 11 ISO source folder:setuphost.exeappraiser.dllappraiser.sdbacmigration.dllappcompat.xslappcompat_bidi.xslappcompat_detailed.xslappcompat_detailed_bidi.xslappcompat_detailed_bidi_txt.xslappcompat_detailed_txt.xslappcompatservicing.dllappraiserdatasha1.catappraiserres.dllappraiserwc.dll
Have you enabled the dynamic updates?
If yes, its similiar with this current problem: https://www.reddit.com/r/SCCM/comments/15tutvf/in_place_upgrade_hanging_recent/
Solution from there and what I also got from a microsoft ticket:Download the newest Win 11 ISO from MSDN/wherever.Download the newest 21H2 from MSDN/wherever.Take these files from the 21H2 ISO source folder and replace them in the newest Win 11 ISO source folder:setuphost.exeappraiser.dllappraiser.sdbacmigration.dllappcompat.xslappcompat_bidi.xslappcompat_detailed.xslappcompat_detailed_bidi.xslappcompat_detailed_bidi_txt.xslappcompat_detailed_txt.xslappcompatservicing.dllappraiserdatasha1.catappraiserres.dllappraiserwc.dll