Learn more about this change here.
For help regarding Aternos, we recommend you to visit our support center.
Can someone please help me with "
Failed to synchronize registry data from server" I am trying to start a pixelmon server but I don t understand what the probleme is. I also don t really know a lot about creating minecraft server, I did step by step what was explained in the videos but it stil don t work; please help.
ty 
The error message "failed to synchronize registry data from server" typically appears when the installed mods on the player's computer do not match the installed mods on the server.
For modded servers, players must have the exact same mod collection installed on their computer as the server.
It is important that the version of the installed mods is identical as well as the version of Forge itself!
If you have so called client-only or server-only mods installed, it may help to temporarily remove them.
