Thannks for your quick response!
Yes, I’ve tried with all the other plugins deactivated. It’s definately an issue of the events manager plugin and the blackmont theme. The default wordpress theme works.
I’ve also tried a few other themes from magpress. The error occurs there, too. Only the newest html5/css3 themes from magpress work.
It’s the same issue as described in the last replies of your related post.
To solve this problem: I have to search the $wp_query; tags in my theme files and delete (or replace) them? Am I right?