Everytime i tried to download the Resource Pack for SchoolRP yesterday and my game crashed, today i deleted it but the Resource Pack got downloaded automaticly wich made my game crash again, even the offical how to fix your resource pack doesn't work, is there another way to fix it?

Today i tried to connect to the server and this error appeard: Failed to connect to the server io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information:

The past days i was joining in the server without any problems, everything good. But now for some reason it keeps saying 'Failed to verify username!' i even searched to YouTube how to fix it, but nothing works, how can i solve it?