Hi, I have the same problem and I've created a post about it yesterday as well... my codes are not working as reported by people so the app launch is not great. Still I got no answers

I have the same issue in Xcode 26 I turned off the blur effect but it's still throwing an error when trying to send the archive to App Store Connect... :/ Validation failed Invalid large app icon. The large app icon in the asset catalog can’t be transparent or contain an alpha channel.

Ok the fix is to save the file instead of exporting it. Then the whole file should be moved into the project area not the assets folder. This solves the problem and I think it's a proper way to do it even though the official developer video about icon composer didn't mentioned it and really was not clear how to properly add icon into the Xcode