As of the 0.23.2 update, apparently some scenario mods I installed have broken. They load as normal but only show, "{{ txt | translate }}" when it loads the scenario. When running version 0.23.1 of the game, everything loaded as normal. The mods I tried were the West/East Coast and Utah Race Week packs, as well as Stage 3 of the Amateur Rally scenarios. Edit to add solution
Bump to say that this is even for vanilla scenarios. I'll be posting in the appropriate forum section if someone else hasn't already.
Bump as I found a solution on my end! When booting the game, instead of launching, go to "Manage User Folder" and open it in Explorer. Then go to the mods folder and delete the "Unpacked" folder. There's a BeamMP folder in there so there might be something in there that conflicts with the current build. Personally I haven't launched BeamMP since 0.23.1. This might not be the fix for everyone, but it's a solution I found after starting in Safe Mode.