Connection Errors
Failed connections, authentication issues, timeouts, bad login errors, and multiplayer join failures.
28 errors in this category
How to Fix Connection Refused
io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused
How to Fix Connection Timed Out
io.netty.channel.ConnectTimeoutException: connection timed out
How to Fix Failed to Verify Username / Bad Login
Failed to verify username! / Bad login
How to Fix Not Authenticated with Minecraft.net
Failed to login: The authentication servers are currently not reachable
How to Fix Invalid Session (Try Restarting Your Game)
Invalid session (Try restarting your game)
How to Fix io.netty.channel.AbstractChannel Error
io.netty.channel.AbstractChannel$AnnotatedConnectException
How to Fix Kicked for Flying
Flying is not enabled on this server
How to Fix Server is Full
The server is full!
How to Fix You Are Banned from This Server
You are banned from this server!
How to Fix Incompatible Client/Server Version
Incompatible client! Please use X.XX.X / This server is running X.XX.X
How to Fix That Name is Already Taken
That name is already taken
How to Fix Packet Too Large / Payload Too Large
Packet too large! / Payload may not be larger than X bytes
How to Fix Disconnect: Spam
Kicked for spamming
How to Fix Internal Exception: Decoder
Internal Exception: io.netty.handler.codec.DecoderException
How to Fix java.net.ConnectException
java.net.ConnectException: Connection refused: no further information
How to Fix Multiplayer is Disabled
Multiplayer is disabled. Please check your Microsoft account settings.
How to Fix Illegal Characters in Chat
Illegal characters in chat / Disconnected
How to Fix Connection Issues Behind VPN/Proxy
Connection error when using VPN or proxy
How to Fix End of Stream Disconnect
Internal Exception: java.io.IOException: An existing connection was forcibly closed
How to Fix Encryption Error on Connect
Internal Exception: javax.crypto.AEADBadTagException: Tag mismatch
How to Fix Read Timed Out
io.netty.handler.timeout.ReadTimeoutException
How to Fix Failed to Synchronize Registry Data
Failed to synchronize registry data from server
How to Fix Chat Reporting / Signing Kick
Multiplayer requires a signed key / Chat messages must be signed
How to Fix Bedrock-Java Crossplay Issues
Unable to connect to Java server from Bedrock
How to Fix Unable to Resolve Hostname
Can't resolve hostname / Unknown host
How to Fix Server Transfer Error (1.20.5+)
Transfer failed / Unable to transfer to server
How to Fix Resource Pack Download Refused
Disconnected: Server resource pack required but refused
How to Fix Slow Login / Long Connection Time
Login takes very long / Stuck on 'Logging in...' screen