I have an error when i run my app .
dyld: Symbol not found: _MTLTextureDescriptorClass
Referenced from: /var/containers/Bundle/Application/AF021777-A14C-4B55-9509-4491521362C4/FlappyBall.app/FlappyBall
Expected in: flat namespace
in /var/containers/Bundle/Application/AF021777-A14C-4B55-9509-4491521362C4/FlappyBall.app/FlappyBall
(lldb)
any solution ???
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