WPA2 Passphrase Not Working

This morning we had a brief power outage (about a second).  Since then, nothing can connect to the 2.4GHz network.  Now the 5GHz network works just fine, however we have some smart home equipment (lights, outlets, etc...) that can only connect to the 2.4GHz network.  I have verified repeatedly that the password is correct.  However nothing will connect to it.  Computers, phones, tablets, not one thing.  I have power cycled several times.  I even tried changing the passphrase to no avail.  It still says that I am not using the proper passphrase.  My next step in my head is a factory reset.  I really really don't wanna have to do that.  It would be such a pain in the butt to set everything back up again.