“SyntaxError: Unexpected token < in JSON at position 0”

Question

In a React app component which handles Facebook-like content feeds, I am running into an error:

Feed.js:94 undefined \"parsererror\" \"SyntaxError: Un

Answer 1

You're receiving HTML (or XML) back from the server, but the dataType: json is telling jQuery to parse as JSON. Check the "Network" tab in Chrome dev tools to see contents of the server's response.