in groups module, there is an error on URL link once your view a group, then within that group - click on the top icon (not nav menu) - located to the left of the sub menu. (one that looks like 3 people)
It links to this url - /m/groups/view/
it should link to - /m/groups/home/
currently gives a page not found.
Once your on the groups home page, then the icon link is fine.
Only has a problem when clicking on it from the groups view page.