#0 system/modules/flexslider/templates/flexSlider_default.html5(8): __error(2, 'Invalid argumen...', '/usr/www/users/...', 8, Array)
#1 system/modules/core/library/Contao/Template.php(255): include('/usr/www/users/...')
#2 system/modules/core/classes/FrontendTemplate.php(37): Contao\Template->parse()
#3 system/modules/core/modules/Module.php(167): Contao\FrontendTemplate->parse()
#4 system/modules/flexslider/modules/ModuleFlexSlider.php(97): Contao\Module->generate()
#5 system/modules/core/library/Contao/Controller.php(290): Contao\ModuleFlexSlider->generate()
#6 system/modules/core/pages/PageRegular.php(138): Contao\Controller->getFrontendModule(Object(Contao\ModuleModel), 'header')
#7 index.php(239): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#8 index.php(407): Index->run()
#9 {main}