Wi-Fi connection bug after One UI update

[Anastasiia32]

I just updated my device (Samsung Galaxy A14) into the latest available version of One UI (6.1). Now I have critical bug: Wi-Fi is connected, but it doesn't work. I always get a message that Wi-Fi doesn't have a connection, but the same network is connected to my second smartphone and laptop - and it works! 
The same situation with mobile data - connection is set up but Internet doesn't work. What can I do with this issue?

[Lingard87]

Try deleting the wireless network and re-adding it.

If that doesn't fix it I'd reboot the router if it serves your DHCP & DNS (if you're not sure what these are it probably does) to see if its been some binary gremlins on that end

[Lingard87]

There's also a way to reset all the networking config on the phone but thats a more extreme option and resets all the wireless and Bluetooth settings you may have so should be used more as a last resort.

[Lingard87]

Also, could you have inadvertently set up a VPN connection and set it to always on and block non-tunneled traffic?

[Klibox]

I reset all Bluetooth and network settings with no luck. Ice tried everything. Just glad I have 4G until I can get onto wifi