I copied some characters over to the PTR and downloaded the client and began to run it. i initially had the same problem as a lot of other players, having the patcher stop at 70%. I took someone's advice, ran wow.exe from the PTR folder and finished patching everything. However, whenever i launch the PTR everything shows up black except for letters. This didnt just happen today, it started from the last time i tried playing the PTR a month or two ago. i thought downloading the newest client would fix it, but everything just stays black. is there any way to fix this?