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

Hi, when Archiving my Unity (2018.1.6f1) iOS project in Xcode (10.1), with OSX Mojave, I get one error stating "liner command failed with exit code 1 (use -v to see invocation) clang" I've already tried the following with no luck: - Removed Unity IAP. - Set the target version from default 8.0 to 9.0. - Set 'enable bitcode' to 'no'. - Removed ARM7 architecture. - Accepted recommend build settings from Xcode. - Tested archiving the sample IAP project (https://forum.unity.com/threads/sample-iap-project.529555/) with success and copied its Unity build and player settings (iOS publish settings). I'd strongly prefer to not update Unity and especially not start a new project. Any help is appreciated.