Failed to connect to the server Unknown Host

My 4 friends are able to connect to the server, but when I try, I get "Failed to connect to the server Unknown Host". If I try connecting with the DynIP, I am able to join the world, but I am falling through the ground and all I can see is the sun. Then I get this error: "Internal Exception: java.net.SocketException: Connection Reset". I tried the Google DNS 8.8.8.8 and also disabling the firewall but those didn't work either. Sometimes when I restart my PC it would work but that stopped happening now.

Log: https://mclo.gs/GTG2QVX

Also I was able to play in the server for a couple of days and also for a bit today.

It fixed itself after I uninstalled and reinstalled the game, if it comes back then i'll update this thread.