I click my browser and I get 'Cannot find Server' I have great signal but I can't sign in:

This sometimes happens for a variety of reasons. As mentioned above, they were some of the reasons, others my be as follows:

Your computer may have hung on its connection. Try rebooting and see if that repairs it.

If you are using a bridge or router, it may have hung or froze. Try rebooting all of your equipment. (this means unplugging the equipment for atleast 30seconds to 1 minute). After reboot, wait a few seconds (atleast 20) then try to login.

You may still have not gotten an IP address from the AP. You may have to check to see if you have the correct one. (Scroll down to 'How do I check my IP Address?) The IP Address you get on your computer if you are plugged into your router will most likely start with a 192.168.x.x address. You will have to log into your router to get the WAN settings that were issued by our APs. This requires you to read your manual that came with the router to do so.