Issue when using Xcode 11 running Canvas on macOS Catalina

Question

I have Catalina macOS version (10.15) installed and still the canvas is not showing up.

The error message I get from Xcode is

Select a scheme that builds a target which contains the current file, or add this file to a target that is built by the current scheme

Answer 1

I filled a Radar FB6123260 please do that also. For me resetting the nvram worked and deleting derived data.

Resetting Nvram

Deleting derived data:

rm -rf ~/Library/Developer/Xcode/DerivedData