How can I fix my Minecraft server?

When I'm at school, my Minecraft server, hosted by Apex, doesn't work; people are disconnected after a minute and it just says connection lost. My school blocks online games, but kids use VPN to bypass this restriction. When they use a VPN on any other server or realm, it works just fine, but on mine it... show more When I'm at school, my Minecraft server, hosted by Apex, doesn't work; people are disconnected after a minute and it just says connection lost. My school blocks online games, but kids use VPN to bypass this restriction. When they use a VPN on any other server or realm, it works just fine, but on mine it doesn't. I used to host a server at my house, and it worked.
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