I had this issue on two different machines, the first one it was a graphics issue, I was running a resolution of 1366x768 which if you check the folder, doesn't have an ini file, I changed resolution to the next step down which was 1280x720 and was able to get in, then I copied the default1280.ini and renamed it default1366.ini and put that file back into the folder, and changed back to my 1366x768 resolution and it's been working ever since.
The other computer I didn’t get so lucky on with the graphics settings, but doing the downgrade worked on that one. Hope this helps someone.