Connection problems

11 errors

Ports, timeouts, outdated client or server, and download failures.

Connection problemsArchitectury & REI Server Packet Error: Cannot invoke class_8710$class_9154.comp_2242() because "type" is nullUpdate Roughly Enough Items (REI), Architectury API, and Fabric API to the latest available versions on both tConnection problemsFailed to bind to port — something is already using itAnother server copy is still running — stop itConnection problemsIllegalArgumentException: Payload may not be larger than X bytesInstall a packet-limit mod for your Minecraft version and loader—such as Packet Fixer (Forge/NeoForge/Fabric 1Connection problemsMojang API Rate Limit: Too Many RequestsReduce the number of uncached custom player skulls placed in always-loaded spawn chunks so the server does notConnection problemsOutdated client / Outdated serverThe client and the server are on different Minecraft versionsConnection problemsRead timed out / connection problems while downloadingThe launcher or loader could not reach the file serverConnection problemsSSL Certificate Error: PKIX Path Building FailedUpdate your Java installation to the latest release of Adoptium Temurin (Java 17 or Java 21) so it includes upConnection problemsSSLHandshakeException: PKIX Path Building Failed (Untrusted Certificate)Turn off local proxies, VPNs, or network accelerators (such as Watt Toolkit, Steam++, or Fiddler) and temporarConnection problemsSSLHandshakeException: PKIX path building failedInstall an up-to-date Java runtime (such as Adoptium Temurin Java 8u400+ for Minecraft 1.16.5 and older, or JaConnection problemsio.netty.util.IllegalReferenceCountException: refCnt: 0Open logs/latest.log on both the client and the server (or LAN host) and locate the full stack trace starting Connection problemsjava.net.SocketException: Connection resetIf you see this in a server console right when a player disconnects, check that player's client `crash-reports