Steam Installed Nid, Now Can't Get Into The Game Without A Crash [solved]

I get the first splash screen, then crash to desktop with the following message:

LoginId:64c9c16340c39a1f5e77e082022a20a2
EpicAccountId:

LowLevelFatalError [File:Unknown] [Line: 3983] Retry was NOT sucessful.

TS2Prototype_Win64_Shipping
TS2Prototype_Win64_Shipping
TS2Prototype_Win64_Shipping
TS2Prototype_Win64_Shipping
TS2Prototype_Win64_Shipping
kernel32
ntdll

Everything was fine before installing Nidderthalbahn earlier today.

 

Verify integrity of files and see what happens

 

Thanks - I don't know why I didn't think of this, but it's fixed the issue, thanks!