´Call to main actor-isolated initializer 'init()' in a synchronous nonisolated context´ Compile error in one file and not an another

Question

I get this compile error in one file and not in another:

'Call to main actor-isolated initializer 'init()' in a synchronous nonisolated context'

If I comment out the line with error it compiles nicely and runs fine. Even with the same line in another file.

Both files are views as shown below.

Any ideas why this beahiour?