O.K. I see it. So, we reinstalled all plugins one by one. Since it works now, it seems, that some plugins doesn't fit combined on Worldpress. Again, thanks for your support. Pls, close this issue. 

Hi Carlos, thanks for your quick response. 

Is there any chance that you could get into this issue by providing you a temporary access on my Wordpress account?

Thank you again for your response on this regards. 

Hi Carlos, thanks for your replay.  

As mentioned, my hoster and I have tried to solve this problem. We also reinstalled boldgrid. However, nothing worked. I'm wondering if other have the same issue with boldgrid, and how they solved this.  

Do you have other ideas?

Thanks, Patrick

I'm getting this issue along with all blocks, and yes, I've disabled other building blocks to see if that was the matter.