Build failed in Unreal Engine 5.3 – “Unresolved External Symbol” in C++ project

Hi everyone,
I’m working on a C++ project in Unreal Engine 5.3 and I keep getting a build error that says:

typescript

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LNK2019: unresolved external symbol referenced in function...

I’ve double-checked that the function is declared in the header file and defined in the .cpp file. I also added the necessary module dependencies in the .Build.cs file, but the error still appears.

Here’s what I’ve tried:

  • Regenerating project files
  • Cleaning and rebuilding the solution
  • Double-checked the function name and spelling
  • Added the module in PublicDependencyModuleNames

Still no luck.
Has anyone run into this before? What else should I look into?

Thanks in advance for any help!