Hỏi đáp Cần giúp đỡ

Starting net.minecraft.server.Main
[09:12:19] [ServerMain/INFO]: Environment: Environment[sessionHost=[URL]https://sessionserver.mojang.com[/URL], servicesHost=https://api.minecraftservices.com, name=PROD]
[09:12:21] [ServerMain/INFO]: Loaded 1290 recipes
[09:12:21] [ServerMain/INFO]: Loaded 1399 advancements
[09:12:22] [Server thread/INFO]: Starting minecraft server version 1.21
[09:12:22] [Server thread/INFO]: Loading properties
[09:12:22] [Server thread/INFO]: Default game type: SURVIVAL
[09:12:22] [Server thread/INFO]: Generating keypair
[09:12:22] [Server thread/INFO]: Starting Minecraft server on *:25565
[09:12:22] [Server thread/INFO]: Using default channel type
[09:12:22] [Server thread/INFO]: Preparing level "world"
[09:12:24] [Server thread/INFO]: Preparing start region for dimension minecraft:overworld
[09:12:25] [Worker-Main-10/INFO]: Preparing spawn area: 0%
[09:12:25] [Worker-Main-10/INFO]: Preparing spawn area: 0%
[09:12:25] [Server thread/INFO]: Time elapsed: 621 ms
[09:12:25] [Server thread/INFO]: Done (2.427s)! For help, type "help"
[09:12:50] [User Authenticator #1/INFO]: Disconnecting datdat (/127.0.0.1:53757): Failed to verify username!
[09:12:50] [User Authenticator #1/ERROR]: Username 'datdat' tried to join with an invalid session
[09:12:50] [Server thread/INFO]: datdat (/127.0.0.1:53757) lost connection: Failed to verify username!

online mode = false trong server.properties