Do you use mods? If yes, you need to make sure that the EXACT same mods installed on both your PC and the server. It is not enough to simply have the same mods installed, they must also be installed in the exact same version. Likewise, the version of the mod loader (Fabric/Forge) must be identical.
If you don't use mods or you are sure they are the same, follow this article.
The thing is i just joined a normal non modded server and it still does disconnect me, maybe its problem is my internet or java?
