For some weeks now I have had the problem that my Ps4 can't be connected to LanKabel anymore, although I have good internet, I'm always told that the server is probably overloaded, but I have internet and all the trimmings
If it says that the server is overloaded, then this is not due to your cable, or your connection, but to the servers of the games. Say, you can't do anything there except wait and hope that they bring their servers up to speed quickly.
Well, I can gamble with Wi-Fi, the problem with the Internet is only when I try to gamble with a LanKabel, then it suddenly shows again "server overloaded", do you understand what I mean?
Then take this error message and put it in here and write in which action of you this is triggered.