Happens on the most recent 2.2.9 but first discovered with 2.2.8. This happens/is displayed only with development mode on. If the logged in user is admin, the error doesn't come up. This happens at least when clicking post total in member popup or "postings" tab on member profile page. Happens too if I use search and search by member.
ErrorException: [E_DEPRECATED] strlen(): Passing null to parameter #1...