[2020] If you can't see the new weather effects, try disabling the "Notice Key Pickup" mod.

The mod hooks into the load_level function but didn't take into account the possibility of new parameters being added, in this case environment_id. Goes to show that the interactions between mods and the base game can be quite complex!

I believe the author of the mod (NonzeroGeoduck7) is working on it and on the Fatshark end of things we're keeping track of it so we can put it on fast track and re-sanction the update ASAP. Shoutout to our wonderful modding community and thanks everyone for your patience while we look into this!