Why You See Endless Red Error Text in Chat/Console
Endless error spam (“Script engine error“, “Missing dependency“, “Failed to load behavior pack“) usually means a required dependency pack is missing, outdated, or has a UUID conflict. The game keeps retrying to load it, flooding your chat.
Top 5 Causes & Fixes
1. Missing Dependency Pack (Most Common)
Many addons require a separate “library” or “core” pack (e.g., Script API libraries, Molang extensions, custom UI frameworks). The main pack won’t work without it.
Open the addon’s manifest.json
Look for "dependencies" array with "uuid" and "version"
Download each dependency from the same source as the main addon
Import dependencies FIRST, then the main addon
2. UUID Conflict (Duplicate Pack IDs)
If you have two packs with the same uuid in manifest.json, Minecraft loads neither correctly and spams errors.
Go to com.mojang/behavior_packs and resource_packs
Open each pack’s manifest.json → check "header" → "uuid"
If duplicates exist: delete the older/duplicate folder, re-import the correct one
Use uuidgenerator.net to generate new UUIDs if editing packs yourself
3. Version Mismatch in Dependencies
The dependency’s version in manifest.json must match what the main pack expects. Example:
"dependencies": [
{"uuid": "abc-123...", "version": [1, 0, 0]}
]If the installed dependency is version [1, 0, 1] but pack expects [1, 0, 0], it may fail. Fix: update the dependency pack or edit the main pack’s dependency version to match what you have.
4. Script Syntax Errors (Runtime Errors)
JavaScript errors in behavior pack scripts cause endless console spam. Common v26+ issues:
“Cannot read property ‘x’ of undefined” → Entity/block not found, check world.getDimension() calls
“Module not found” → Import path wrong or missing @minecraft/server-ui, @minecraft/server-net
“Event subscription failed” → Using old events.beforeChat instead of world.beforeEvents.chatSend
Fix: Open the script file (.js), fix the syntax, re-import. Use Bridge to validate scripts before importing.
5. Corrupted Pack Cache
Minecraft’s internal pack cache gets corrupted. Nuclear fix:
Close Minecraft
Delete com.mojang/behavior_packs/[problem_pack] and resource_packs/[problem_pack]
Delete %localappdata%/Packages/Microsoft.MinecraftUWP_8wekyb3d8bbwe/LocalState/premium_cache (Windows)
Restart Minecraft → re-import clean
How to Read the Error Logs
Enable Settings → Profile → Enable Content Log
Errors appear in: com.mojang/minecraftpe/logs/content_log.txt
Search for ERROR or SCRIPT ERROR — the line above usually names the pack and file
Quick Diagnostic: Disable Packs One by One
In a test world, disable all behavior packs. Enable one at a time, reload world. The error spam starts when the problematic pack loads. That’s your culprit.
Last updated: July 2026 | Works for all Bedrock 1.21.x versions
