What You Will Need
Step 1 - Update your cookie settings
If you have seen the error below on Chrome, go to the cookies page in your settings here and choose Allow all cookies.
Step 2 - Log into the correct Canva account
You may also come across the error shown below. This is likely the result of you trying to access a saved image without being logged into the account that the image is saved to.
You can head over to Canva and log into the proper account and try again.
See this article for more details on this particular error.
What You Can Do Now