Below is a screenshot of an error you may encounter when trying to submit a file to an assignment. The original "Save" button becomes "Submit Failed, please try again" and prevents you from submitting the assignment:

If you keep seeing the error after refreshing the page, try the following to correct the error:

• Clear Browser Cache and Cookies: Sometimes the data stored on your computer/browser can cause issues. Clearing the cache and cookies forces the browser to start over and reload the page instead of using cached data. Refer to the following Knowledgebase article to learn how to clear the cache and cookies for your browser: Clearing Browser Cache and Cookies
• Update Browser: Check to make sure your browser is up to date. Canvas is designed to work with all major browsers but you should confirm you're running a current version noted in Instructure's guide: What are the browser and computer requirements for Instructure products?
• Try a Different Browser: Again, Canvas is designed to work with all major browsers but there may be settings in your current browser that are affecting your ability to submit the assignment. Trying a different browser will help to confirm if it's a browser-specific issue. Generally, Chrome tends to have fewer problems.
  • Note: You may try toggling the setting to prevent cross-site tracking in your browser on or off to see if that corrects the issue.
• Use an Incognito/Private Window: Using an incognito/private window will turn off any extensions that may be causing issues. Refer to the following Knowledgebase article to learn how to open a private browsing window: Private Browsing
• Try Using a Different Device and/or Internet Connection: Sometimes different firewall settings may prevent the file upload. Most often, this occurs when students are trying to submit an assignment on an employer-provided device that may have different firewall settings enabled. Try using a different device or internet connection to see if that fixes the issue.