can't build wso2 emm ios agent xcode project

Question

I imported the ios agent xcode project but when I build it I get 3 errors:

"_OBJC_CLASS_$_OHHTTPStubsResponse", referenced from:

  objc-class-ref in ApiResponseTest.o

"_OBJC_CLASS_$_OHHTTPStubs", referenced from:

  objc-class-ref in ApiResponseTest.o

ld: symbol(s) not found for architecture armv7

clang: error: linker command failed with exit code 1 (use -v to see invocation)

I think that it is something to do with adding the library, but I don't know how to do that since I'm very new to ios.