Error LNK2019

Hello, I’m having a problem using an external library that a friend of mine coded externally to unreal engine.

I have created a folder for the header files and another folder for the .lib files. I’m able to import the .h file without errors into my code but when I try to access a function inside the library I get the error LNK2019.

You need to instruct UBT to link the static lib. This should help Third-Party Libraries | Unreal Engine Documentation