I just purchased Tabs 3&4 today, On Lorderean Realm,
Already have them full of stuff.
Only Guild Master rank can even access them.
Sometimes they don't even show up.
I try to set officer rank permissions for them and it doesn't save.
(Once again if they even show up in guild control panel).
I have tried renaming ranks, new guild master, closing client, letting someone else try it.
Nothing is working and it has been a few hours now.
I also took screenshots of my tabs in case the server deletes my tabs with all of my items.
If other tabs are working correctly, new ones might start working after server restart. If you are using some addon for managing guild bank settings, try disabling it. I don't think there is anything else you can do about it right now. If it's still not working after a server restart, make a support ticket in game.
I also took screenshots of my tabs in case the server deletes my tabs with all of my items.
If the tabs disappear, screenshots won't help you. The only way to save the items in that case would be taking them out before the tabs disappear. I haven't heard of that happening but if you want to be safe, take the items out til first server restart and see what happens after that.