Bukkit

What steps will reproduce the problem?
1. connexion in online mode in the server
2.
3.

What is the expected output? What do you see instead?

Log files write this at each player connect
so database are ok

[18:07:03 INFO]: UUID of player Jupyter is 0000000000000000000000000000000000
[18:07:03 INFO]: 8[7INFO8] 6Le joueur eJupytere 6vient de rejoindre le jeu.
[18:07:03 INFO]: [Backup] Stopped last backup, because someone joined.
[18:07:03 INFO]: No operations allowed after statement closed.
[18:07:03 INFO]: [LegendaryMessages] Database Error!!!

[16:00:02] [Server thread/INFO]: CONSOLE: Forcing save..
[16:00:02] [Server thread/INFO]: CONSOLE: Save complete.
[16:05:13] [User Authenticator #1/INFO]: UUID of player Vorkul is 0000000000000000000000000000000000
[16:05:13] [Server thread/INFO]: §8[§7INFO§8] §6Le joueur §eVorkul§e §6vient de rejoindre le jeu.
[16:05:13] [Server thread/INFO]: No operations allowed after statement closed.
[16:05:13] [Server thread/INFO]: [LegendaryMessages] Database Error!!!
[16:05:13] [Server thread/INFO]: [Inquisitor] Initialized Vault for Permissions
[16:05:13] [Server thread/INFO]: [Inquisitor] Initialized Vault for Economy
[16:05:13] [Server thread/INFO]: Vorkul[/000.000.000.000:49788] logged in with entity id 21411 at ([Freebuild] -361.

etc...

What version of the product are you using?
LM 5.2

Do you have an error log of what happened?
yes if you want !

Please provide any additional information below.