The problem
Some users are reporting an error message ‘Invalid or Missing State’ when attempting to access a Turnitin submission for marking or submitting.
This error is local to the user’s web browser and Turnitin have stated that this error can occur when launching an LTI assignment with 3rd party cookies and/or JavaScript blocked.
The majority of cases we have seen on the Helpdesk have been related to Safari security settings on Apple devices however the issue also appears less regularly on all operating systems and different browsers.
Potential Solutions
Try a different browser
As the problem is browser based a quick solution would be to try an alternative browser. We have found that this has been most successful on Windows environments. You might try switching to Firefox/Google Chrome or Edge.
This approach has been less successful on Apple devices, probably because of similar security settings across multiple browsers.
Enable Third Party Cookies
We recommend visiting https://www.whatismybrowser.com to get a browser report, this will tell you if you have third party cookies disabled.
In the example below third party cookies are disabled.
The help text on the right hand side ‘How to enable third-party cookies’ will give you advice for enabling third-party cookies on your browser. Full details are available here https://www.whatismybrowser.com/guides/how-to-enable-cookies/
Things can be a little more complicated on Safari (Apple Devices) so the below videos show you the process.
For Safari users whose browser report says they do not have third-party cookies enabled, we send them one, or both, of these video links, which are instructions for enabling third party cookies in Safari.
For Apple Computers:
For iPhone/iPad