Group Objects Missing: Geometry Monster

Stuck on Part 5 of Geometry Monster Tutorial to group 4 objects after they are added. I added the four objects, clicked on three squares (right corner), but the Objects Groups does not show so I am unable to group the four shapes - my pic shows no object groups on the right. Only the layer opens at the bottom when I click on the the three boxes in the right corner. How do I group objects without the Objects group which should be showing to the right of the word, Objects? Thanks for your help
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You will found more about Object group on this wiki page :slight_smile: