I have made a massive overhaul to Quel'thalas (Eversong Woods) in Noggit, corrected crash zones and ensured everything works. However when I enter the area in-game the loading screen goes through 3/4ths of the way and then I receive...
https://gyazo.com/8b4682c388260176b69ce1ca42bc1370
or
https://gyazo.com/e7a6dd73d64c5be362b96312826e320f

I'm new to removing crash zones, but I've ensured every ADT has 4 textures in every place.

(And before anyone asks, yes I have a PC strong enough to handle these things, so I know I'm not running out of Memory.)

Any solutions to this?