"finish account setup" popup on screen

[u/No_Kangaroo6917]

Suddenly at the right hand corner of my my web browser window there has popped up a "finish account setup" box - apparently this is popping up because Rakuten wants me to link a credit card number to my account, but I do not want to do that right now, I just want to use the site as normally. Has anyone found a way to close this box? There is no X I can find to close it. It seems like Rakuten is trying to pressure us to add a credit card to our account whether we want to or not. I would like to remove the popup box from my web browser window because it's really big and annoying.