Missing color viewer, color slider and spot color set

Hi,

I am trying to help someone to fix this issue. He said the CorelDraw graphic suite stop displaying the color viewer, the color slider and the spot color set on his Mac. I have included a screenshot. It may help. Is it due to a setting? I have reset the workspace and tried to find a solution online, but I am out of ideas.  Thanks a lot

This is another screenshot:

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