© 2026 Hedgehog Software, LLC

TwitterGitHubDiscord
More
CommunitiesDocsAboutTermsPrivacy
Search
Star
Setup for Free
AdmincraftA
Admincraft•15mo ago•
23 replies
brodyofhearts

unable to join modded forge server while everyone else can

error message: "Internal Exception: io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: readerIndex(40) + length(8) exceeds writerIndex(44) FooledUnsafeDirectByteBuf(ridx: 40, widx: 44, cap: 44)"

logs: https://mclo.gs/RAtTgBG

i've made sure that i had the same modpack as everyone else, i deleted all playerdata relating to me that i could find, allowed minecraft through firewall, tried restarting the server and updating my computer, reinstalling minecraft, using curseforge repairing functions for instance and profile. sometimes it allows me in the game for a few seconds then kicks me for nearly the same reason, the exact numbers sometimes change. im able to create and join singleplayer worlds but unable to join the server specifically. any and all help is appreciated :)
mclo.gs
Forge 1.20.1 Client Log [#RAtTgBG]
9894 lines | 172 errors
AdmincraftJoin
10,704Members
Resources

Similar Threads

Was this page helpful?
Recent Announcements

Similar Threads

Fixing lag on modded forge server
AdmincraftAAdmincraft / questions
13mo ago
Hardware requirements for modded Forge server
AdmincraftAAdmincraft / questions
3y ago
Unable to join velocity server.
AdmincraftAAdmincraft / questions
3y ago
Unable to connect to a modded server
AdmincraftAAdmincraft / questions
2y ago