JSON - Exception in server tick loop

If you find your server crashing or not starting up with the following error showing in the console and crash logs:

java.lang.NullPointerException: Exception in server tick loop

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


This error message typically means that there is an issue or corruption with one of your ops.json or whitelist.json files.


The following steps will guide you on fixing this issue:

Step 1. Stop your server

Step 2. Access your servers files using FTP and delete the ops.json and whitelist.json files or replace them with a backup copy of these files

Step 3. Start your server



If you have any difficulties with following this guide, or any other issues with your server, please open a ticket with our Minecraft Technical Support Team.
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