Nostalrius Begins - Quality wow vanilla realm (1.12)

Well I came to a conclusion to make a post about this because I have lost my nerves to try to fix this , here it goes so I've installed rapidquest helper did everything correctly everything seems to load but I get an error on the middle of my screen that looks like this :
PS ; I have no other AddOns installed except these ones. Hopefully you guys can help me I will appreciate ur suggestions