Minecraft error internal exception java.io.ioexception an existing connection was closed by the remotehost?

I played Minecraft with friends on our server as normal, suddenly I always got this error message and when I joine I get kicked out after a maximum of 30 seconds. Many people on the internet say that it can be bad internet, but I'm also on the phone with friends on discord and it works perfectly. Java edition is up-to-date, I have also restarted mineraft. Does anyone else know what?

Had the problem myself. As it turned out after almost 3 months, it was on the Internet for me. Maybe restart the router or check the website (at Fritzbox e.g. Fritz.box) to see if the router needs new updates. Otherwise look again if you have another router somewhere for a lan connection. If the case occurs, simply download and update the program for the respective router from the company's website

I had that too, you have to try restarting the router and then join again. This message can only come because of internet errors or the hoster has problems trying to join another server. LG

Probably was really on the Internet, the next day it was gone again.