Same Issue on Xcode 15.4 and the las version for IOS, WatchOS and MacOS.

Same problem. Download all the 2020 SDK and Python Bindings didn't worked out for me. But after I installed the 2019.5 SDK (Clang) and 2019.5 Python Bindings, I was able to get it running. macOS Big Sur 11.4 beta (20F5046g)