Warning: sprintf() [function.sprintf]: Too few arguments in …

Hello, I got this message at the beginning of every post: Warning: sprintf() [function.sprintf]: Too few arguments in (...)wp-content/themes/clean-journal/inc/clean-journal-core.php on line 803 ... and only when I use the theme in German language. I have found these files while using the search option: https://www.dropbox.com/s/hf4m17mps6ovdjw/Clean%20Journal%20de_DE.zip?dl=0 I replaced the de_DE.po and .mo but that doesn´t fix the problem. Can you please tell my where to find the error in the translation files? Thanks alot! Bernd.