Student getting an error when submitting student annotation assignment

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I have a student who cannot submit annotation assignments. She is using Chrome, and after she annotates and hits submit, she gets an error that says TypeError: Cannot read properties of null (reading 'focus'). Then Canvas reloads the essay and deletes all her annotations. 

I have never seen this before. How can she fix it? 

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Community Contributor

I would start by clearing the cache in the Chrome browser to see if that clears up the issue. Another thing I would check is to make sure they're running at least the latest version of Chrome.

Here's how to clear the cache in Chrome: Clear cache & cookies - Computer - Google Account Help

If neither of those resolve the error, I would then file a support ticket with Canvas.

Hope this helps.

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