How to connect to WiFi on Windows:
How to connect to WiFi on Mac:
If you are on certain browsers (Safari, Firefox, Chrome, Microsoft Edge) exit out of the tabs completely and open them again. You could also try opening a different browser to the one you were currently on.
How to restart on Mac:
Shut down or restart your Mac
How to restart on Windows:
https://support.microsoft.com/en-us/windows/restart-reboot-your-pc-110262aa-fc79-1c33-7b00-c140ae3a6dac