Wifi

I have an Apple laptop with trend micro premium security suite 2020. My issue is that there is no problem connecting to our home wifi and using internet search engines. I also use my laptop at school and I did not have a problem until this week. I am connecting to my school’s wifi but when I try to utilise google for instance, it tells me there is no internet connection and to check the firewall or keychain. I have done this and everything is clear. I am connected to the school wifi because I am using it to iMessage people. Hence why I am confused why it’s telling me I have no internet connection when trying to use a search engine. I deleted the school’s wifi and then reconnected it, but it is still doing the same thing. What am I missing? Have I missed something in my privacy settings or is trend micro blocking something I haven’t noticed?