Hello! Our German is terrible, so lets try our friend Google Translator 😉
Hello! Unfortunately my English is not so good, therefore in German. The popup I find very great, unfortunately I have a problem in Adobe Muse. The popup was placed on the pattern page. However, it is covered by other content (eg photos, text, graphic elements).
An easy fix would be moving widget from master page to each individual page, otherway, you will need to play with Adobe Muse “Z index”.
Please, check this article: http://responsive-muse.com/2016/04/11/problem-with-adobe-muse-widgets-and-z-index/