Nostalrius Begins - Quality wow vanilla realm (1.12)

Apologies if this is a misinformed/noob bug post, I've spoken to several people in game and they have no idea, I also searched before posting this.

I'm a lvl 10 warlock on the new PVE server, with 34 tailoring, I was getting the fetch quest for Void and checked out the Master Shadoweave trainer, then this happened




Could someone explain what this is, and if it is bannable?