Hiya - only effects shadows lands PTR - retail and classic are fine.
Error #0x851000000 Assertion Failure!
Program: c:\program files (x86) World of warcraft\ptr_\wowT.exe
ProcessID: 13564
ThreadID: 736
D:\Buildserver\Wow\3\work\shard-checkout\branches\wow-patch-9_0_1 -branch-fastpatch-21\Engine\Source\GX\src\GXApi.Cpp
Line: 635
Expr: dx11support
like I say, only effects shadowlands PTR - and yes, I have looked at the thread about this issue - tried all.
Ideas?