Under the 'Reports' section, clicking on the 'Alerts' section does not actually load the Alerts but instead loads '/reports/summary'. Presumably this section is missing at the moment?
the alerts section was renamed to events before the reports section was made available publicly, maybe you need to clean your browser cache first.
Or maybe it is a browser specific problem? Which browser and version did you use?
I attached a screenshot where you can see what the reports section should look like.