Laptop connects fine at home but not anywhere else. How can I fix this?

I have a Lenovo laptop that's a couple years old. At home it connects to Wi-Fi perfectly with no issues. I brought it to school and tried to connect but it won't connect to any other Wi-Fi places. It'll show the networks on the list with max strength but when I try to connect it just says error. Also tried it on my phones hotspot. Same thing, it showed up, max strength then didn't connect. What's wrong with my computer?