System notification/message: “Another device on the network is using your computers IP Address. If you continue to have problems, change the IP Address of this computer or the IP address of the other device”.
Update the WiFi settings using the article here: https://www.imore.com/another-device-using-your-computers-ip-address-heres-fix
Try resetting the WiFi: in the Network Settings, switch it off, wait 30 seconds, and turn it back on (disconnect then connect).