Compilation failed while executing: ld64

Latest build 32.0.0.103 - my app now fails to compile with:

ld: entry point (start) undefined.  Usually in crt1.o for architecture arm64

Undefined symbols for architecture armv7:

  "_OBJC_CLASS_$_NSObject", referenced from:

      _OBJC_CLASS_$_CTAppDescriptor in libRuntimeInterpreter.arm-air.a(CTContentPlayer.o)

      _OBJC_CLASS_$_ExtensionInfo in libRuntimeInterpreter.arm-air.a(CTContentPlayer.o)

      _OBJC_CLASS_$__CTPlayerTimerGlue in libRuntimeInterpreter.arm-air.a(CTPlayer.o)

      _OBJC_CLASS_$_ServiceASyncOnMainThread in libRuntimeInterpreter.arm-air.a(CTPlayer.o)

      _OBJC_CLASS_$__CTGestureState in libRuntimeInterpreter.arm-air.a(CTStageView.o)

      _OBJC_CLASS_$__CTTouchInfo in libRuntimeInterpreter.arm-air.a(CTStageView.o)

      _OBJC_CLASS_$__CTTransform in libRuntimeInterpreter.arm-air.a(CTStageView.o)

      ...

  "_OBJC_METACLASS_$_NSObject", referenced from:

      _OBJC_METACLASS_$__CTGameInputDevice in libRuntimeInterpreter.arm-air.a(CTGameInput.o)

      _OBJC_METACLASS_$__CTGameInputButton in libRuntimeInterpreter.arm-air.a(CTGameInput.o)

      _OBJC_METACLASS_$__CTGameInputAxis in libRuntimeInterpreter.arm-air.a(CTGameInput.o)

      _OBJC_METACLASS_$_CTAppDescriptor in libRuntimeInterpreter.arm-air.a(CTContentPlayer.o)

      _OBJC_METACLASS_$_ExtensionInfo in libRuntimeInterpreter.arm-air.a(CTContentPlayer.o)

      _OBJC_METACLASS_$_CTApplication in libRuntimeInterpreter.arm-air.a(CTAIRApplication.o)

      _OBJC_METACLASS_$__CTPlayerTimerGlue in libRuntimeInterpreter.arm-air.a(CTPlayer.o)

      ...

ld: symbol(s) not found for architecture armv7

Compilation failed while executing : ld64

AIR 32 from January - all was ok.