Well, my first thought was that something is wrong with your HGWC, because the error message says the HGWC.exe is closed. But if you truly reinstalled the game it is probably caused by a program you used or by yourself.
Well, you could have closed the HGWC process by mistake (via the Taskmanager) or you used a program which tries to close the HGWC process.
Please test if this is true and report back.
Probably

does know more because he has made

about S4 League Errors.