When a 'click here' link fails to work in a web page it's often because of an incompatibility between the browser you're using and that particular web page. So, if you're accessing your email via a web browser (rather than a dedicated email client), try using a different browser. You might find that the link then works.
Alternatively, create a new email address (if you've not already got a second one to use), come to AB, click on 'view your profile' and then on 'Edit My Profile'. Enter your new email address in the relevant fields and click 'Submit'. Your current avatar will then disappear and be replaced by the default 'jelly babies'. Then go to Gravatar.com and create a new account, using your new address and the avatar of your choice. Once you're using the same email address for both AB and Gravatar your new avatar will appear here.
(If you need somewhere to create a new email address, I recommend GMX:
https://www.gmx.co.uk/ )