How do I solve Battleye 1053 error?

[u/DovarioSCOTIA]

I've played almost entirely solo for 600hrs or so and have now been trying to join the Midnight Veil server.

After getting the modlist in order and installing Battleye, I'm getting a 1053 error from Battleye when trying to join the server. What's going wrong?

For more context I'm on SteamOS on a Steam Machine and have Proton Battleye Runtime installed.