skill trainers are showing as unknown entetie

Hi guys! Im new here and I need some help, currently my server is running off Uwc 1.3.5 and my wow version is the hacked patch version of 1.11.1 and the server is awesome, i mean it has working professions, the new item models and everything. There is just one problem when a player is say a paladin he can see and speak to all trainers although they wont teach him or her anything because of the class restrictions the paladin will not be able to speak to a paladin trainer as the paladin trainers name is no longer what it normally is and is replaced with "unknown entetie" and the player can not speak to the trainer. So in total I would ask if anybody could please assist me by telling me how to fix this problem

I see unknown creatures too...the trainers are ok, but some creatures like gnolls etc are unknown. Anyway, I saw I am able to complete the quests, even if the quest target is to kill those unknown entities. The quest is counting their number, but you have to guess that the unknown creatures is the quest's target. So for now, it doesn't bother, but I'm afraid I will meet this shit further in the game and it will not be so easy to bypass.

Delete the files in /world of warcraft/WBD ;)