Q:

Merged account, cannot access Email settings

Trying to access my email settings page I am redirected to an error page:
https://meta.stackoverflow.com/users/email/settings/2986984
I had merged 2 accounts, thus I had 2 email adresses.  I deleted one, but it still kept being used for subscribing to tags.  That old email adress is still floating around somewhere in my account data without me being able to see, modify or delete it. 

A:

The email settings page broke.  A fix for this is rolling out in the next build (rev 2017.11.29.27887).