invalid or corrupt file

[Contrean]

[Visual Studio 2019]
Hi,
when I try #include "HTTPRequest.hpp" and then try to compile I get the error "Invalid or corrupt file: cannot read at 0x5F48". I can see the file in the solution explorer and added it to the additional dependencies in the linker. The Microsoft-Docs say to recreate the file, but even that didn't help.
Sorry if I am just forgetting something but I am a bit new to c++.