I met the same problem. I changed the minimum system setting of Xcode to below iOS 14, which can compile normally, but this is not a suitable solution, because the minimum system of our App is iOS 14 Assertion failed: (reconstituted == (accumulator - _options.machHeaderVmAddr())), function setFixup64, file OutputFile.cpp, line 3001.

Assertion failed: (reconstituted == accumulator), function setFixup64, file OutputFile.cpp, line 2975. Have you solved it? I found that the minimum compatible system can be changed to iOS 13