Good day. I encountered error “unable to complete version check” today as well. Most interesting part that I launched game this morning as usual without any problems. Just in 30-40 minutes I tried to launch it again and got this error. I tried every single method described on this topic as well as from internet – none helped. I will try to work with this problem a little more in worst case I have to reinstall game and download it all over again – not the most pleasant way and quite time taking.