My boyfriend's mom's tablets suddenly can't connect to our WiFi. His dad has the WiFi split into two, and we suspect he may be able block certain people from it. Our friend used to be able to get on our WiFi but was suddenly denied. He had to go to this site and type in another password. But his dad claims is because he uses a VPN, which he doesn't.
Now neither one of her tablets will connect. We keep getting authentication errors. The password is correct, one tablet is newer, and one is a bit older. Did his dad block her tablet? Is there a way to tell? What else could it be? She has apps that let her keep in contact with his sister's doctor which is super important and her tablets need to work.