Summary
"JSON - Exception in server tick loop" is an error message that can occur in a Minecraft server when there is an issue with some .json files. These are ops.json, usercache.json, and whitelist.json specifically. Removing these files and starting the server back up to recreate them will resolve the issue. For any help or questions, connect with the BisectHosting support team here.
| Note | This error will appear in the console:java.lang.NullPointerException: Exception in server tick loop at net.minecraft.server.v1_7_R3.JsonList.load(JsonList.java:171) |
How to fix the "Exception in server tick loop" error
1. Stop your server.
2. Click File Manager. 
3. In your root directory, delete the ops.json, whitelist.json, and usercache.json files.
4. Start your server.
