I’m guessing that your realm was affected by realm connections recently? This is something that has been reported quite a few times and still has no fix or comment from Blizz. I’ve linked the main post below!
One GM suggested to a player that we should report this through the in-game Bug Report option. We’ve been doing this in hopes that it gets fixed soon.
On the notes for recruitment, currently the only way to invite members to the guild in manually. We cannot view applications and whether or not you can even find the guild in the finder is hit or miss.