Look in the htaccess you attached. Cannot have 2 htaccess in the same place. Put it in /vanilla pretty sure that should. (If you put it in root you overwrite the one wordpress) You could also use sub domain forum.domain.xx Instead of domain.xx/forum
I dont know when this started to happen as I dont pay attention to this page much but I just noticed that I cant seem to load the Dashboard. I just get 2 differnet page cannot be found errors and When I inspect the page i see the following errors Any ideas why this page will no longer load?