Header File not found! Strange Visual Studio Compiler error

Hi,

I am integrating Lyra UI Source Code in my game project and I have some strange errors where compiler tells that he cannot find C++ header file but it is existing in source code.

Screenshot 2026-10-15 174958

Can you please help me to resolve this issue? I do not understand what causing this error and why compiler not see header file im source.

Please help!

Ruslan