Fatal error: Uncaught Error: Call to a member function is_id() on null in /home/httpd/vhosts/spinnerei-blumer.ch/httpdocs/i4/plugin/filemanager/Filemanager_action.php:53
Stack trace:
#0 /home/httpd/vhosts/spinnerei-blumer.ch/httpdocs/i4/Cms.php(126): plg_Filemanager_action->process()
#1 /home/httpd/vhosts/spinnerei-blumer.ch/httpdocs/index.php(8): Cms::run()
#2 {main}
  thrown in /home/httpd/vhosts/spinnerei-blumer.ch/httpdocs/i4/plugin/filemanager/Filemanager_action.php on line 53