GarageBand will not open older song files

GarageBand will not open older song files.

By ‘older’ I mean songs from mid-2025. The iPadOS 17, and so on. It gets through the loading-up and crashes right at the point it would normally put you into the song editor. Not only ones with problem Audio Units. It’s a universal issue. iPadOS 26.2.1 has not fixed, on my iPad Pro M1.

I take it from this, there is an issue opening the song editor inside of iPadOS 26 and derivatives. Willing to try any ideas. Cannot compile the album I am working on.