Describe the bug
When starting a game in Half-Life: Alyx for mod "Return to Rapture", it crashes at the moment it should start the new game.

To Reproduce
Steps to reproduce the behavior:

1. Subscribe to "Return to Rapture" - https://steamcommunity.com/sharedfiles/filedetails/?id=2236102052 and wait for the files to download
2. Start SteamVR & Half-Life: Alyx
3. Go to addons -> Enable Return to Rapture
4. Start New Game -> Select Return to Rapture -> Star Game with Addon

Expected behavior
The "Return to Rapture" gameplay should start

Actual behaviour
The game and SteamVR crash completely. Running via steam -console, I got this output: https://gist.github.com/Patola/bd79418c2a4776e01dc1d8f4412b7038

System Information (please complete the following information):

• Distribution: tried in both Arch Linux and Ubuntu 20.04
• SteamVR version: beta 1.15.4
• Steam client version: Build Oct 23 2020, at 20:26:58
• Opted into Steam client beta?: Yes
• Graphics driver version: 455.28
• Gist for SteamVR System Information: https://gist.github.com/Patola/a5c590b382a0b951c98e9bc241d095b0

Additional context
Reported the crash to the mod author too, just in case, although he doesn't run Linux.

Note: Commenters who are also experiencing this issue are encouraged to include the "System Information" section in their replies.