Please check the URL (i.e. the long code of letters and numbers) is copied correctly from your email.
If you can't click on it in the email, you'll have to select and copy it from the email. Then paste it into your browser, into the place you would type the address of any other webpage.
If you got the email more than two months ago or updated your user profile, then this login link won't work any more. Please try doing what you were doing from the beginning.