Unable to select y axis column name on hue notebook

[Heena Yeole]

Hi,

  I am using hue dashboard first time. I am facing as I am not able to select y axis column name as per my required field but I can select x axis column name.

Can you please suggest waht necessary steps to be taken so that this option its enable and I can select column 

name as per my requirement and show the bar graph accordingly.