VS 2017 C# Web-service Could not load file or assembly 0x80131045

From VS 2017, when I "run" the program with IIS Express I get the following error:

Could not load file or assembly 'XXXX' or one of its dependencies. Strong name signature could not be verified. The assembly may have been tampered with, or it was delay signed but not fully signed with the correct private key. (Exception from HRESULT: 0x80131045).

I tried solving it with signing the assembly "fixes" I found, they did not work. Every other solution I found was specific to the assembly named in the error. Is there a general fix for this issue?