App Extension : Undefined symbols for architecture arm64

I am trying to install pods into AppExtension target with

target 'NotificationService' do
    pod 'CleverTap-iOS-SDK', '~> 3.10.0', :modular_headers => true
end

This pods are also added to my main app target and working fine. But when I try to install same pods to Notification Service extension, I am running into Unity library related error (90 error of same kind for libiPhone-lib.a).

Undefined symbols for architecture arm64:

  "std::__1::basic_streambuf<char, std::__1::char_traits<char> >::imbue(std::__1::locale const&)", referenced from:

      vtable for std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> > in libiPhone-lib.a(CrashReporter.o)

  "std::__1::basic_streambuf<char, std::__1::char_traits<char> >::setbuf(char*, long)", referenced from:

      vtable for std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> > in libiPhone-lib.a(CrashReporter.o)

These errors are not coming if I add same pods to main Target. Also, Unity is not installed on any Extension, just on main Target. I wonder if I have to add/remove any library or header paths from extension by which it doesn't consider Unity inside extension project. Screenshots of settings attached for reference.