I apologize for this experience you're having in your account! Have you tried working in a different browser or a private/incognito window? I also would suggest checking the zoom settings in your browser. If your zoom is set to a number higher than 100% this can cause the pop-up to get cut off. If you are still unable to close this pop-up after testing your browser and zoom, would you be able to provide a screenshot? After taking a peek at your account I was unable to replicate this experience. Having a screenshot can allow us to troubleshoot further for you.