I´ve got this error while deploying may app. Anybody knows what is it?

Python recognizes ‘multidict._multilib’ as an importable package[^1],
#0 12.78 but it is absent from setuptools’ packages configuration.
#0 12.78
#0 12.78 This leads to an ambiguous overall configuration. If you want to distribute this
#0 12.78 package, please make sure that ‘multidict._multilib’ is
explicitly added