Web Import Problem: Cannot login or "required anti-forgery cookie" error

When trying to use the web importer I am getting this error after signing into my account in the web import window: Error: The required anti-forgery cookie "__RequestVerificationToken_L2FwcA2" is not present.

This error message means you are using the old Add to MasterCook bookmark that web browsers block and no longer allow to work. You need to right-click on the Add to MasterCook bookmark in your bookmarks bar and select Delete Bookmark to delete it from the web browser.

Next, you need to go get the add-on extension for your web browser and use it instead. Please follow these instructions:

https://support.mastercook.com/hc/en-us/articles/216890146-Using-the-MasterCook-com-Web-Importer