Just recently when trying to use the web importer with Chrome, I'm getting an error occurred while cooking your request with the error message that states Error: The required anti-forgery cookie "__RequestVerificationToken_L2FwcA2" is not present.
This happens only in the Chrome web browser. It means the cookie setting that MasterCook.com uses in Chrome on your computer is being blocked and is not keeping you logged into your MasterCook.com account. You can confirm this by using a different web browser. You can easily import the bookmarks from Chrome into Edge. See these instructions.
Chrome released an update to some of their customers, and it caused this problem. Today (4/10/2020) a customer states it suddenly started working for them again after Chrome gave them a new update. Specifically, they shared this info: "My Chrome version is now Version 81.0.4044.92 (Official Build) (64-bit)"
Try Another Web Browser
Other web browsers like Safari and Firefox also allow you to import your bookmarks/bookmarklets from Chrome. You can import your bookmarks into the Edge web browser as explained here:
Another option is to reinstall Chrome exactly as explained here and make sure you use the Delete Data setting too:
That has corrected this problem for a few others since it returns them to a pre-updated version of Chrome.