As the title suggests, the Guild and Communities tab is marked as Unavailable across all of my characters as of today when I woke up. That was not an issue before.
Following the suggestions of Blizzard in threads of years ago with a similar matter, I checked my settings, but they were unchanged. I uninstalled addons, removed the WTF folder, scanned and repaired the game, but nothing seemed to do the trick. Other people, though none I know, seem to be having the same issue.
I did report it as a bug and opened a ticket, but since I was not certain if those were the right steps to take for this, I am submitting this forum here, in case anyone else is also having the same issue. Can this be fixed? Has anyone had any luck?