Removing the XCTest lib now I get a totally different error:

Termination Description: DYLD, Symbol not found: _$sBi64_WV | Referenced from: /var/containers/Bundle/Application/BF7A328A-92BB-4216–9F2F-C2D87D9B434F/Tinder.app/Dylibs/libswiftos.dylib | Expected in: /private/var/containers/Bundle/Application/BF7A328A-92BB-4216–9F2F-C2D87D9B434F/Tinder.app/Frameworks/libswiftCore.dylib | in /var/containers/Bundle/Application/BF7A328A-92BB-4216–9F2F-C2D87D9B434F/Tinder.app/Dylibs/libswiftos.dylib