Failed to connect after 4 retries

I’ve been trying to connect to this server that some of my friends are playing but when I start connecting it says failed to connect after 4 retries. I tried to look it up but it’s solutions for the person running the server. Plz help.

Its coming up with the solutions for the owner because its him.
Might wanna do a little work on your own, too.

Maybe the server is full or a plugin you have is stopping you