Which specific seller hub page are you looking at? And which country site are you using? I see a mix of German and English in your image.
I do not see any such info box when I go to my Seller Hub page on ebay.com, and if I go to the same page on ebay.de, the info box appears, but I can close it using the "x" button in the corner of the box, at least in my browser (Firefox). Opening the page in another browser does not display the info box once it has been closed, so perhaps if you open that page in another browser and close the box, you can return to your original browser and the box will no longer appear once you refresh the page.
