JSON - Exception in server tick loop

If your server won't start and is displaying this error:

java.lang.NullPointerException: Exception in server tick loop

at net.minecraft.server.v1_7_R3.JsonList.load(JsonList.java:171)

 

This means there is an issue with a core JSON file.

To fix this error:

  1. Stop your server
  2. Access your server's files through FTP
  3. Validate the ops.json, whitelist.json, and usercache.json files by pasting them into a validator here
  4. Fix any errors and replace the old files with the corrected files
  5. Restart the server

If that doesn't fix the issue, contact us through a support ticket.

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