I would be very happy if you will have an idea for fixing my problem.
I tried to design my blog costume feed and it doesn't matter in which page or in witch category - when I'm trying to change the design of it, suddenly the box of the costume feed disappear (I can still see the outline of the box, but it's blanked and nothing I'm trying to do, doesn't bring the feed back).
Until now, I changed the design a lot of times and everything worked great, but now I tried to reconnect to the website, duplicate the website, open an new costume feed - but every change of the design ends with the same blanked box.
And it also happening while I'm trying to design the Posts list feed.
Your help needed, Thank you very much!