400. That’s an error.

Google cannot redirect you to http://www.digizeitschriften.de/no_cache/en/home/browsen/erweitertes-browsen/?tx_jkDigiTools_pi1[col]=12&tx_jkDigiTools_pi1[cat]=678&tx_jkDigiTools_pi1[ord]=title&tx_jkDigiTools_pi1[let]=M&tx_jkDigiTools_pi1[link]=10 because the request was invalid.

This might be because the link was created a long time ago. Try your search again on Google. That’s all we know.