Any resolution of this ? I have just hit this problem after using Xcode 16 for a few days to build a project. Suddenly this morning I started getting this same error about missing files from the linker.

OK this line of code seems to have tripped Xcode up resulting in the above errors DebugLog("No planogram fixtures for \(level.store.code).\(\(level.store.number))") Note that the typo wrapping the 'level.store.number' twice - coupled with the fact that number is not a property on store seems to have been enough to confuse the compiler as no compiler error was being shown. Not sure why that code error suddenly started showing up now which allowed me to fix it. Seems the error above is indicating that some source file has failed to build so start by tracking down the file and look for the code error the compiler hasn't been displaying an error for.

I used the Clear History from the SPM screen and then closed the SPM panel and reopened it and suddenly it was working again !

It is beyond baffling that there is no simple explanation of the steps that are required. Every explanation in the Apple documentation and in online explanations are fragmented and disjointed and appear to always omit some critical step. Like "notary tool doesn't require a signed DMG" - well OK but does Gatekeeper not require a signed DMG? Why does the Apple example of customising the Xcode archive process make no mention of Stapling anything - not in the document nor in the sample script ? Why is that - is stapling something that is optional - if it is not optional why is it not included in the sample script ? Similarly the sample script doesn't code sign the DMG file - why not ? Surely the sample script should produce a DMG file that is ready for distribution ? Hopefully I am just missing something simple here.

Have you tested on 26.2 to see if that fixes it ?