I frequently get this error message in my multi module project. Error goes away after I clean the project. Really annoying.

Multi-module ≠ Multiplatform You can report the issue on kotl.in/issue and attach the reproducing project (privately if needed), and mention IDE info (copy pasted from about window), and used Kotlin version in project and IDE plugin.

It is also a multiplatform

I'm having similar issues. Also with Exceptions. It warns that I cannot use our FooException class (defined in Kotlin mpp common) inside catch since it expects Throwable. It's an IDE issue. Everything compiles just fine.

No one is reporting the issue with IDE details?