Are you having trouble loading any other custom maps or is it just this one?

@Mogabi


CAsyncWavDataCache: 2 .wavs total 0 bytes, 0.00 % of capacity
Dropped MR.GodLike*D3adShot* from server (Disconnect by user.)
BinkOpen( c:\program files (x86)\steam\steamapps\common\left 4 dead 2\left4dead2\media\l4d2_background03.bik )
------------------------------------------------------------------Console say-----------------------------------

I cant start it either it says "the server is consitancy for the add-on models/infected/hunter.mdl"

Dropped ★ Fongus Star ★ from server (Disconnect by user.)
BinkOpen( c:\program files (x86)\steam\steamapps\common\left 4 dead 2\left4dead2\media\l4d2_background05.bik )

Help!

Its a known issue now that many workshop mods are causing weird consistency errors, even on official dedicated and properly configured servers.

Occasionally, mods can be poorly made and can interfere with basic gameplay; this is becoming unfortunately fairly common with workshop mods, since the workshop has very little moderation and the community that uses it is frequently very lax in calling out bad mods. If you're still getting errors on official servers, pay attention to the specific error it's giving you and disable any recent addons that have relevance, e.g. look for a hunter mod you have when you have a consistency error concerning the hunter.

Try inputting this into the console prior to loading the map aswell! "sv_consistency 0"

for me it starts loading and then the bar goes to 0 and then it stays like that forever