Blank first page in blog with masonry layout

Dear support,

I have a strange problem: I use the blog as my homepage and since today the first ‘page’ (out of 3) just shows up blank – the logo and tagline show up and the pagination, but the rest is blank, no content. This happened with an oder version of WordPress too, I now use 4.1 and have also installed your update. The following pages display correctly.
I would love to have the blog back again as it was as soon as possible. Hope you can help!
The site is:
https://halfpipe007.de

Best wishes