Hey this looks like is an issue with the auth cookie from your account, If you're using a google account you'll need to delete your connections in your google settings then re link the account again, Delete cookies and data on your PC.
The linking issue is not related to this website but more with your google account and any blockage between the site and your PC, ie any apps you have running, old cookies. Try this:, If you use a browser use another browser like Edge or Firefox and make it default for your PC, then log in. If you log in with the same browser you use for everything is already causing the problem.