My server won't start

Work through these in order. Each step rules something out.

1. Read the console

Open Console and press Start. The last lines before the server stops usually say what went wrong, such as a plugin name, an out-of-memory message, or a version error.

2. Check the logs

In Files, open the logs folder and read latest.log. If there is a crash-reports folder, open the newest file in it. When you contact support, include the last lines of the log.

3. Test for a bad plugin

1. Stop the server.
2. In Files, right-click the plugins folder and Rename it to plugins_off.
3. Start the server.

If it starts, a plugin is the cause. Rename the folder back to plugins, then move plugins out a few at a time until you find the one that breaks it. Update or remove that plugin.

4. Test for a bad world

In Properties, search for level, change Level Name to something new such as testworld, save, and start the server. If it starts, your old world is the problem. Change the name back, and restore a backup. See also Regenerate your world.

5. Check your version and Java

If you recently changed your version, the server may need a different Java version. See Change your Minecraft version.

6. Not enough memory

Messages such as OutOfMemoryError mean the server needs more RAM than your plan provides. Remove heavy plugins or mods, or upgrade your plan.

7. Last resort: reinstall

Settings, then Danger Zone, has Reinstall Server. It re-runs the original install, stops the server, may overwrite configuration files, may reset some game data, and cannot be undone. Create and download a backup first.

Still stuck? Open a ticket. See Contact support.