Warning: Parameter 1 to Sh404sefClassRouterInternal::sh404sefErrorPage() expected to be a reference, value given in Unknown on line 0

Fatal error: Uncaught TypeError: Argument 1 passed to PlgSystemRedirect::handleError() must be an instance of JException, instance of Error given, called in /home/httpd/vhosts/swisswetter.ch/httpdocs/administrator/components/com_sh404sef/classes/router.php on line 1939 and defined in /home/httpd/vhosts/swisswetter.ch/httpdocs/plugins/system/redirect/redirect.php:66
Stack trace:
#0 /home/httpd/vhosts/swisswetter.ch/httpdocs/administrator/components/com_sh404sef/classes/router.php(1939): PlgSystemRedirect::handleError(Object(Error))
#1 [internal function]: Sh404sefClassRouterInternal->sh404sefErrorPage(Object(Error))
#2 {main}
  thrown in /home/httpd/vhosts/swisswetter.ch/httpdocs/plugins/system/redirect/redirect.php on line 66