Can't modify front page sections

I can change only text, but not able to change team members in “team”, and skills bars in"about" sections… if I try pressing the button “Add & Edit Members” nothing changes or appears.
Am I missing something? I’ve installed all recommended plugins…

Hi there

Please accept my apologies for it. A similar problem has already been reported, and we are currently waiting for the developer to fix it. Unfortunately, I regret to inform you that I cannot offer any workaround at the moment.