Possibly unrelated, but...
I have been "getting away with" having a Sub declared "As Boolean" (dating back to when I thought that was valid).
But when I tried to compile with the new beta version I got a complaint "cannot implicitly convert type 'string' to 'bool'" (as attached). The Sub has a number of Return statements which all use "False" or "True" values, as you might expect. The error message points to the last line of the Sub.
I had wondered if the built-in constants have implied types in the new language.
Mike.