Selection (pulldown menu) has no action in Agenda's calendar

Hello,

I’m new to Dolibarr, and during evaluation, I come across something of which I’m not sure if it is me or it is the application.

In Agenda, there is no action after selecting anything in any pulldown menu. I’m sure there are events belonging to other Users, but there is no change.

Is there a configuration issue? Please see attachment.
Untitled

Also, how do I create multiple calendar, say, one calendar per User that only she/he can view, but admin can assign events to them?

Oh, there is a small magnifying glass button on the upper right hand side. I need to click it to submit the filter.