This page is regarding the PC Rift version of the game.

Found using API Monitor, when the game calls function ovr_GetLoggedInUserID it gets a result of 0 instead of something else, which seems to prevent it from doing other things it needs to startup.

The dumbest/easiest way I've found to get past the issue is to NOP out one of the calls from DCVR-Win64-Shipping.exe which allows the game to start, already purchased DLC will work, but the game will act offline (like Quest 1 version) and offline leaderboard will show name as “None”.

Patching DCVR-Win64-Shipping.exe version 1.2.2:

• Make a backup of DCVR-Win64-Shipping.exe
• Use your favourite Hex Editor to open this file.
• Go to file offset: 0x2BBE25
• Unmodified the byte here will be: FF
• Change that byte to: 90
• Save and try the game as you normally would (in my case it's with that modified Revive).

The LIV/Mixed Reality using Mods page has the notes regarding the modified version of Revive (https://github.com/Jas2o/Revive-ExternalCamera) that allows SteamVR users to use a tracked camera with Oculus MRC games.