Can't open some nodes

Hi

On a page I’m building, I have a very strange error.
Some nodes I can’t open anymore. It’s just hanging, but in the edit mode I’m getting all the data.

OK:
http://www.wpbaumanagement.ch/node/273

NOK:
http://www.wpbaumanagement.ch/node/274
but edit is working:
http://www.wpbaumanagement.ch/node/274/edit

Can somebody help me finding the problem?

In the drupal log I can’t see any error and the when I start the debug mode in chrome I’m also getting no data when starting the 274 node without /edit.

Drupal version: 


Source: https://www.drupal.org/taxonomy/term/22/feed