First, you need to download an extension called Cookie Editor
https://chrome.google.com/webstore/detail/cookie-editor/hlkenndednhfkekhgcdicdfddnkalmdm?hl=en
Then go to grammarly.com and click on the Cookie Editor extension
Then click "delete all" and then click "import" and paste this the text in the link below
https://0bin.net/paste/O-CBEbvl#ktAcjrMDuey8vcSGeD0F4U4OLVZs50beQY7yd5CQbbN
OR
http://www.linkstricks.co/2020/07/free-grammarly-premium-account-cookie.html
Now Refresh the page
And then you will have a premium account for Grammarly!
If it stops working do the process again. If it still doesn't work then search "Daily Grammarly Cookies" on Google and paste one in Cookie Editor.
Thanks!
GUYS DONT LOG OUT! It will break it for everyone, instead just delete / clear cookies. if you log out you break the cookie. Thanks, Catlover790!