Main menu is not transparent

I can’t get the sticky menu to work. The menu shows as black by default and I can change the color, add text and logo but I can’t get it to be transparent and then stick when I scroll down and change to black when I am scrolling down. I did go to the menu’s options and clicked the sticky option but nothing seems to change.
Thank you.

Hi,

Please post a link to your website, so I can check.

Kind Regards,
Csaba