Set custom time dilation doesn't cast to player pawn

In many tutorials like here:

Is possible attach get player pawn to target node set custom dilation function.
In my case it’s immposible:
Screenshot - 2017-06-25 , 02_45_17.png

Particle sytem component reference is not compatible with Pawn Reference

Any solutions?
Casting also doesn’t work

Set the value of Custom time dilation to 10.

The real time dilation of the actor is GlobalTimeDilation * CustomTimeDilation, which, in your case, is resulting to 0.1