Forge server won't start – first steps?

Read logs/latest.log and crash-reports/. Common: mod version mismatch for MC version, Java too old, missing dependency mod.

Mod loading error / missing dependency?

Install missing mod from log. Align all mods to same Minecraft + Forge version. Remove mods one by one to test.

Forge or Fabric – different errors?

Forge uses forge-*.jar + mods/ folder. Fabric uses fabric-server-launch.jar. Never mix Forge and Fabric mods.

Minecraft Forge Server Won't Start – Mods, Java & Crash Reports

Quick answer: Forge won't start: read crash-reports/ + latest.log, match Forge to MC version, Java 17+ and install missing mod dependencies.

If you landed here: Forge JAR crashes on mod loading, "Mod X requires Y" or server stops after seconds.

Error → fix

Symptom / log	Fix
Mod X requires Y	Install mod Y in mods/
Incompatible mod set	Align all mods to same MC/Forge
UnsupportedClassVersionError	Install Java 17
OutOfMemoryError	-Xmx8G or more RAM in panel

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Minecraft Forge Server Won't Start – Mods, Java & Crash Reports

Error → fix

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