ERR Model '#Entities/Vehicles?Truck/ambulanceTruck01Prefab.prefab' not found on block with name cntAmbulanceTruck01
Error, this needs a clean reinstall according to the darkness falls mod discord.
A lot of people on the DF Discord are reporting the issue. They'll be a few without it, but that just means that prefab file never got created on their rwg ( RWG will pick a load of prefabs to load, in this case you seemed to have a map that has one loaded that no longer exists)
The above were messages from my server customer support. After mod launcher updated to darkness falls 19.1 and i updated steam and darkness falls mod on my control panel my server stopped working. the server customer support can't fix it and told me i would need to reinstall and lose my world and progress. why did 19.1 mess up my world so now i have to start from scratch? 19.0 was working just fine for me.