Try restarting the router, the modem, and also both together a couple of times. Give it some time (less than 10 minutes, I don't know how long exactly you need to wait) to see if you get connectivity.
Try restarting the router, the modem, and also both together a couple of times. Give it some time (less than 10 minutes, I don't know how long exactly you need to wait) to see if you get connectivity.