Nostalrius Begins - Quality wow vanilla realm (1.12)

Hi, im having problems with my proffesion tab.i can only see 2 of my potions i can make.
A error appears whenever i open it. Anyone else experiencing same issue?
Error: Interface\FrameXML\UIDropDownMenu.lua:183: Usage: DropDownList Button2: SetText("text").
Im currently not using addons.
Regards
Risa

You'd think this was an addon conflict...

I only saw this problem one other place and that was on feenix. In that thread there is no help offered, merely that it is unfixable....which I find hard to believe. The only suggestion there was to just work through it, making the highest potions available and that it would eventually "fix itself". I guess, implying when you reach max level it repopulates itself.

But, there's got to be a solution to an interface problem...

Ah theres this one:

I'm assuming you've tried disabling all addons and testing? If not do that, but if that doesn't work, try deleting the Blizzard_TradeSkillUI folder from addons and the WDB folder in the base World of Warcraft, restarting the client and testing, again with all other addons disabled.

Thanks. it didnt work when i disabled all addons and reset. but deleting those 2 folders resolved the problem