if MochaVex's suggestion did not help figure out the issue, then try Network Reset from the setting please. You'll need to re-setup the BT and WIFI you had before.
With your wifi turned on, going into settings, Connections, click on wifi, choose your router connection, click on tool icon on the right, click advanced tab, scroll down to MAC address type and make sure it's set for Phone MAC and not randomized. I hope it's as simple as that. Good luck!
