Error - Unterminated object at line X column YY path $[0].n

While working with Delete Metadata Step and Test Level in Deployments module, we may face different issues. 

Below is one error that can be appeared in the deployment. 
 Unterminated object at line 1 column 22 path $[0].n

Reason - The issue may occur when the JSON file (Test Classes) we attach is not properly validated. There may be some tag missing or extra tags. 

Resolution - Any JSON validator can be used to check if the file is validated or not.

Here is one example

How did we do?