Hi there! Tawny from Moz's Help Team here — thank you for writing in and sorry about the trouble.
We do hear reports on this from time to time from our users.
One of the things we've discovered is that most of our users experiencing these issues have blocked all third party cookies in Chrome. Once we had them add an exception for moz.com that seemed to solve the remaining issues they were seeing.
That being said, would it be possible for you to check to see if this is the case for your version of Chrome? To do so, you'd just visit chrome://settings/content in your browser's bar, and then under the "Cookies" section - do you have the box next to "Block third-party cookies and site data"?
Here's an example.
If that box is checked, you can either un-check it and then click "done", or you will need to add an exception for moz.com by clicking the "Manage Exceptions" button just below it. The exception will need to specifically be formatted like this: [*.]moz.com.
Here's an example.
Once you've done that, please close the MozBar out completely, and then your browser out completely and then re-launch them and let us know if you're still having issues?
Thanks so much - sorry again for the inconvenience here!