Linker Command Failed

[ArtVista]

I have created a VST3 for PC and I am now using the source files to create a Mac version in Xcode. I am receiving two “Apple Mach-O Linker (Id Error)” errors. What am I doing wrong?

Undefined symbols for architecture x86_64:
“VST3::StringConvert::convert(std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > const&, char16_t*)”, referenced from:
Steinberg::Vst::HostApplication::getName(char16_t*) in include_juce_audio_plugin_client_VST3.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

I am on macOS Mojave 10.14.6

[ArtVista]

After deleteing the whole “Builds” folder and re-compiling, the error now shows as one error.

Undefined symbols for architecture x86_64:
“VST3::StringConvert::convert(std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > const&, char16_t*)”, referenced from:
Steinberg::Vst::HostApplication::getName(char16_t*) in include_juce_audio_plugin_client_VST3.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Any suggestions where to go next?