How to place columns in a circle? My goal

I want to create a radial array of columns like in this screenshot:



Tutorial that I am following

Blender 2.8 Array Modifier Rotate video on YouTube.

My steps


I've create a single column object:





I've create a plain axis:





Added «Array» modifier to the column:





Set «Relative Offset» to (0, 0, 0):





But when I set «Object Offset» around the plain axis, I get this:




What I do wrong? I can not understand what I missed.
Apply scale. Press Ctrl+A. Apply scale

Now select the empty and rotate