I, too, am getting this, and find it very frustrating. I can't figure out which extension is causing the message, so short of deleting and adding them all, I don't know what to do.
Thanks in advance for any help.

@johnd78 Still doing it for me Actually, I hadn't seen it for awhile, and it just started up again.

I, too, am getting this, and find it very frustrating. I can't figure out which extension is causing the message, so short of deleting and adding them all, I don't know what to do.
Thanks in advance for any help.