Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello!
I installed the game on my laptop for the first time. Recently my friendlist got crushed. Sometimes there is no one online. Other times the friendlist is puzzled.

Already tried to delete WTF files and stuff. Didn´t change anything.

2 hours ago I installed the game on my desktop PC. Friendlistbug is the same. These 2 PCS don´t share any connection in terms of save files, wtf or anything.

How do I get my friendlist back? Is the problem server or accountsided?

Ty for your help, Appreciated

Friendlist data is stored on the server, if I'm not mistaken. I don't think there are any files on the local machine that store friend names.