iPhone 14 Pro will connect to school wifi, but will not work and pops up with "No Internet Connection"

Here's the rundown,

Before I upgraded to the iPhone 14 Pro, I had an iPhone 11 Pro. This iPhone worked completely fine on the school internet. I could connect and browse as normal. Although, I did use a vpn to bypass the block on the wifi so I could use it without having to download the county's certificate profile onto my phone. So, when I upgraded to my new phone, I try connecting to the same internet with the same password, etc. and it will connect, but it wont work. And it will come up with a yellow warning that says "No Internet Connection". Now, I know it is only my phone because the Wifi still works on my computer, it works on all of my friends phones, and they use the same VPN as well (X-VPN). So, I'm wondering if my iPhone is blocked because of some previous use of a VPN or something, or if it's just a coincidence and it's out of my hands. I already attempted talking to my librarians who manage the wifi, and they basically told me things I already knew and didn't help with my connection issue, so I'm turning to you guys. If you have any clue on what to do, or have any questions, let me know.