This method is unconfirmed yet but u guys can try this if it works:
1- reinstall game (using an old installer)
2- just let game update itself
3- open the chams and then click accept
4- just wait, when HSupdate.exe opens, open task manager (alt + ctrl + del) and select SHupdate.exe --> set priority --> turn it to lowest.
5- after that you get a combat arms error, but dont click Close, just let it be open