@joel2001k : Can you please elaborate, how exactly you fixed this issue? We are facing the same provlem.

If we are building the app directly using the DevOps Pipeline and trying to submit the same, we are getting the below error and it gives no clue as to what is missing. We verified that we included all the icons. Asset validation failed (90270) Unsupported toolchain. Packages submitted to the App Store must be created either through Xcode, or using the productbuild[1] tool, as described in "Submitting your Mac apps to the App Store." Packages created by other tools, including PackageMaker, are not acceptable. [SIS] (ID: 3bdb4443-894e-457b-b36d-8219ebdfe1d9) Asset validation failed (90259) Bad Bundle Executable. You must include a valid CFBundleExecutable key in your bundle's information property list file. (ID: bb39f4d3-3e53-481b-9236-33e04f3007fd)

This is really becoming a bottle neck and very unfortunate that this is not catching any attention. Please let us know if anyone found a way to fix this issue. We tried this across Visual Studio versions and encountering the same error.