EXCEPTION: Assertion failed! #0 /is/htdocs/wp1133502_PT57W3G21I/neu/site/markup_components.php(927): ag_assert(false) #1 /is/htdocs/wp1133502_PT57W3G21I/neu/www/show_activity.php(68): ag_display_activities('bonn', 'tennis', '', 'Vereinssport', '12470') #2 {main}FEHLER