Q. Why do I get "invalid JSON string" every time I upload a file for an assignment or other on Moodle?


Try theses steps in this order:

1) Refresh the page – it is possible AJAX just didn’t load when the page loaded.
2) Log out of Moodle and back in – this may cause AJAX to load in the browser instance
3) Close the browser and re-open it
4) Try another browser (I.E. 9.0 is a browser known to have these issues)
Each of these is aimed at getting AJAX to load without errors, and therefore fixing the issue.

  • Last Updated Jan 08, 2019
  • Views 2620
  • Answered By IT Help Desk

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