Unable to run debug mode in VS 2017 on a project

I am trying to run a debug mode but nothing happens. When i look at the output window there is a error msg saying :

Exception thrown: 'System.IO.FileNotFoundException' in mscorlib.dll
The program '[9876] FarmBrowser.exe: Program Trace' has exited with code 0 (0x0).
The program '[9876] FarmBrowser.exe' has exited with code 0 (0x0).
The program '[9876] FarmBrowser.exe: Managed (v4.6, v4.5, v4.0)' has exited with code -1 (0xffffffff).

I've tried almost everithing....