The same problem, caused by upgrading xcode, xcode version 13.3, flutter version 2.8.1.
Solution 1:
Downgrade xocde to 13.2.1
Solution 2:
My computer is M1, so it may not be suitable for you：
1、Delete the pod directory
2、sudo gem pristine ffi --version 1.15.3
3、pod install
4、Open workspace in Xcode ，Pods > Target > 11.0
Test time 2022-04-07 00:30， I only know Chinese, these words are translated by Google
cnsecer
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