Xcode12 - MacOS linker error: A building for macOS, but linking in object file built for iOS Simulator, for architecture x86_64

Development Platform & Builds Mobile
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I use protobuf lib for my project.
When building scheme Development-Editor to run on MacOS 10.15, getting this error:

ld: building for macOS, but linking in object file built for iOS Simulator, for architecture x86_64

I’ve tried all of solutions:

  • Build only active architexture: YES

  • Add Valid_arch: x86_64
    but there is no hope.
    I also run

    otool -l ./libprotobuf.a | grep platform

and the result is:

platform 1

which means the lib is build for macOS,

It was a warning on XCode11 but is an error on XCode12.
Every idea is appreciated.