Undefined symbols for architecture x86_64: "typeinfo for ACharacter", referenced from:

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1

Hello. I can’t compile my project on my mac. Linker gives the following error:

Undefined symbols for architecture x86_64:
  "typeinfo for ACharacter", referenced from:
      typeinfo for AWalkingPawn in Module.ConstructorApp.12_of_16.cpp.o
  // And it continues listing down typeinfos for other classes.

Wha should I do?

2

Did you ever figure out what was going on?