Xcode error - module cannot be imported Swift 5.2.2

Questions
1

I am trying to test my app and when I compile it in Xcode I get the error: Module compiled with Swift 5.2.2 cannot be imported by the Swift 5.3 compiler. It seems to refer to AppDelegate.swift

Is there a workaround for this?
Thank you for any help,

2

Actually, the module that gives the error is RuntimeKit.swiftmodule

3

Ah looks like we need to update the libraries for Xcode 12. Sorry about this, will get to it for the next release