So for me that page is broken. It reads "My Activity" and then its just a grey page.

Some ideas:

* Check for Netflix extensions and disable them in case they are breaking the page.

* Turn off "Test participation" in Your Account

* Open the console and see if there are any error messages.

* Contact Netflix Support (there is a link from Your Account and when I've tried it I have gotten a response right away.)

Normally, for me the page looks very similar to https://www.netflix.com/MoviesYouveSeen (and is linked to from there.)