Because it most likely needs a tech to look at it but there are things I do after firmware updates that repeat time after time I must share them.

First I look around for a factory reset. This varies with each model but I've found it necessary after some firmware updates.

Second I forget WiFi if it messes up and try a wired connection.

Next I move to the 8.8.8.8 DNS (why, how is on the web.)