By any chance, have any settings changed at the router? Especially, the SSID, passphrase, Wi-Fi bands, and any settings regarding 802.11 modes? If so, can they be set back as before? (And also, a real remote is handy for dealing with these situations, so you might want one for the long term.) By the way, sometimes settings get changed without asking you – especially with ISP-rented routers. They have a tendency to turn off 2.4GHz or change 802.11 modes without feeling any need to tell customers about it.
Banned but back. Because why not?
