RedM server error

Hi, when I try to log-in in a RedM server, this error message appear.
I tried to disconnect my Rockstar Social club and steam account and nothing resolved.
I tried to delete RedM data folder a lot of time and sometimes it works but i cant download 4gb of RedM data every time that I want to play to a server.
I’ve this error only in this RedM version…

This error comes from the server you are trying to join. So it is not a RedM/FiveM problem and you should contact the server owners instead of this forum.

What could be the problem? They don’t know it!

“they” wrote these scripts, we don’t have access to their server even, so join a different server that doesn’t seem unaware of what they run/installed?