Wifi Connect Option Button Wont work

Wifi Connect Option Button Wont work

Hello I recently just got a Nexus 5x, and I am having Wi-fi problems. When i set up the phone it connected to my home wi-fi fine. The problem is when I am at school, it is able to find the wireless network. The network requires a pass word, when I put the password in the option to press "connect" wont allow me to press it. The "connect" option button is gray-ed out so I cannot click it.

PLEASE HELP cannot find the solution anywhere !