What is wrong when every line in *.gradle.kts files is marked red? This occured first with Arctic Fox Canary 5 so I tried AS 4.2 Beta 4 but it's still present. The build runs successfully. Should I buy a new computer?

You should try changing the JDK. It fixes the issue

@Jeff Yeah I saw your post a few days ago. This works indeed for the *.gradle.kts files but not for some imports in my composite build. Do you have observed similar problems?