Hey, today i instaled luckperms, but when i want to join the server it says >�[2K [19:02:57 INFO]: com.mojang.authlib.GameProfile@1f53c91[id=658df945-9c6a-30c3-a3e2-6a7aa1da7493,name=Zizoska,properties={},legacy=false] (/) lost connection: §7§l[§b§lL§3§lP§7§l] §cPermissions data for your user was not loaded during the pre-login stage - this is likely due to a conflict between CraftBukkit and the online-mode setting. Please check the server console for more information.

�[2K [19:03:07 WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2319ms behind, skipping 46 tick(s)

Please help

Read the error. It clearly mentions what the issue is (In your case using CraftBukkit in offline mode)

You can see in the https://luckperms.net/wiki/Installation#craftbukkit-and-offline-mode
Wikipedia for a problem