Activity details in topic list fail when default locale is bosanski jezik

Since we updated our Discourse to v2.3.0beta10 on list of topics details shows error en_US.dates.tiny.x_minutes.other

Our discourse is set to bosanski jezik in default locale.
Is this missing translate or bug.
When I set default locale to Englis, there is no errors.

This looks like the same (or very similar) problem that is described here.