Bueno Theme – Post Content is not displayed anymore

Good morning!

I just had the bad surprise to find out yesterday that all the posts on my website http://www.romantic-holidays.net were not being displayed anymore. According to the support provided by the my webhosting company, the problem is due to the theme I am using (Bueno – framework 4.5.3). Indeed, when I changed theme to Twenty Eleven everything seems to be working fine.

In addition, all pages seem to work fine.

Example of post
Example of page

Any idea of how I could fix this issue?

Thank you very much for any help!
Have a nice day!