Warning: simplexml_load_file(): ./hydro/latest.xml:1: parser error : Document is empty in /home/httpd/vhosts/outdoor-informatik.ch/aare.outdoor-informatik.ch/index.php on line 9

Fatal error: Uncaught Error: Call to a member function xpath() on bool in /home/httpd/vhosts/outdoor-informatik.ch/aare.outdoor-informatik.ch/index.php:11
Stack trace:
#0 {main}
  thrown in /home/httpd/vhosts/outdoor-informatik.ch/aare.outdoor-informatik.ch/index.php on line 11