Latest CU Error? "This file is not a valid Appx package because it is missing a manifest or block map"

[tistou77]

For versions prior to 26100, the Appx packages could be integrated before the CU (even with 26100) due to the AppXAllUserStore.dll file
As for the other issue, the cause needs to be identified

 

[tistou77]

That's explains it

this is a backported bug behavior from Canary build 29634
you can't add apps together in a single dism session, if the host OS is pre 26100

something changed in AppXAllUserStore.dll cause it to be compatible only with host OS 26100 or later
in your case, CU is added before apps, hence the image AppXAllUserStore.dll is updated, hence the error occurs

ir's not dism error itself

It seems that there is also a problem with build 26100

With host 26100.8973 (AppXAllUserStore.dll 26100.8972) an error occurs when Appx packages are integrated after the Preview
However, it works fine if the Appx packages are integrated before the Preview

If so, how is it possible to integrate Appx packages into the 26100.8973+ ISO, for example (for those using it) ?

EDIT : I'll need to run another test, but for build 26100, it seems the issue isn't the host itself, but rather the update to "AppXAllUserStore.dll" within the image

EDIT2 : I tried replacing the DLL in the host with version 26100.1, but strangely enough, the file turns into version 26100.8972 (but still 2024 for date)
Perhaps a display bug or something else