iPod Touch 5th gen "Can't verify server identity"

So my school requires a log-in for which you need to go to in order to access the wifi. So first you connect through settings, then you go to safari and search for a random page, and then the window should pop up. However whenever I try to do that, I always get the same message:

"Safari can't verify the server identity"

Or something like that. Anywho, I've tried changing my dates and times. I've also tried resetting my network settings. My iPod is able to connect to everything except the school wifi, but all my friends who own both iPhones and Androids are able to connect and it's starting to get really frustrating. Please help me because I don't wanna go another 3 years without wifi at school 😟.