Ultimate Discovery Bug

So I'm trying to do the Ultimate Discoveries in Nesaak and this one "Nilrem's Sealed Letter" seems to be bugged. According to the wiki the door should say insert key. All I get is a flash of it saying "null" there in that picture and that's it. I can't interact with the door to proceed. Any help or maybe if it's a bug that needs fixed would be awesome and much appreciated.

 

Have you tried using /class

 

It still brought up 'null" on the doors, but I was able to interact with them after doing a class swap and then back to my main. thank you.

 

null is just the mob name, shouldn't mean a lot