Hello,
I've created a non-premium server a few weeks ago under Spigot, my friends and I had a few sessions on it. Then I change server version to Fabric and some of my friends couldn't log in anymore. They have the error Player Invalid Data, although the server has online-mode turned to false.
A weird fact is that one of my friend can actually play with a cracked version, but the other just can't log in to the server, although they have the same version, and the same launcher.
I've already tried to delete playerdata from the server files, with no clue.
Thanks in advance.
