Warning: in_array() expects parameter 2 to be array, null given in system/modules/core/library/Contao/System.php on line 124
#0 [internal function]: __error(2, 'in_array() expe...', '/var/www/vhosts...', 124, Array)
#1 system/modules/core/library/Contao/System.php(124): in_array('getInstance', NULL)
#2 templates/nav_superfish_horizontal.html5(1): Contao\System->import('\\I18nl10n\\Class...', 'I18nl10n')
#3 system/modules/core/library/Contao/BaseTemplate.php(88): include('/var/www/vhosts...')
#4 system/modules/core/library/Contao/Template.php(238): Contao\BaseTemplate->parse()
#5 system/modules/core/classes/FrontendTemplate.php(38): Contao\Template->parse()
#6 system/modules/core/modules/Module.php(371): Contao\FrontendTemplate->parse()
#7 system/modules/core/modules/Module.php(256): Contao\Module->renderNavigation('89', 3, NULL, NULL)
#8 system/modules/core/modules/ModuleNavigation.php(96): Contao\Module->renderNavigation('1', 2, NULL, NULL)
#9 system/modules/core/modules/Module.php(154): Contao\ModuleNavigation->compile()
#10 system/modules/core/modules/ModuleNavigation.php(48): Contao\Module->generate()
#11 system/modules/core/library/Contao/Controller.php(310): Contao\ModuleNavigation->generate()
#12 system/modules/core/pages/PageRegular.php(133): Contao\Controller::getFrontendModule(Object(Contao\ModuleModel), 'TOP')
#13 system/modules/core/controllers/FrontendIndex.php(250): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#14 index.php(20): Contao\FrontendIndex->run()
#15 {main}

Fatal error: Uncaught exception Error with message Class '\I18nl10n\Classes\I18nl10nFrontend' not found thrown in system/modules/core/library/Contao/System.php on line 124
#0 templates/nav_superfish_horizontal.html5(1): Contao\System->import('\\I18nl10n\\Class...', 'I18nl10n')
#1 system/modules/core/library/Contao/BaseTemplate.php(88): include('/var/www/vhosts...')
#2 system/modules/core/library/Contao/Template.php(238): Contao\BaseTemplate->parse()
#3 system/modules/core/classes/FrontendTemplate.php(38): Contao\Template->parse()
#4 system/modules/core/modules/Module.php(371): Contao\FrontendTemplate->parse()
#5 system/modules/core/modules/Module.php(256): Contao\Module->renderNavigation('89', 3, NULL, NULL)
#6 system/modules/core/modules/ModuleNavigation.php(96): Contao\Module->renderNavigation('1', 2, NULL, NULL)
#7 system/modules/core/modules/Module.php(154): Contao\ModuleNavigation->compile()
#8 system/modules/core/modules/ModuleNavigation.php(48): Contao\Module->generate()
#9 system/modules/core/library/Contao/Controller.php(310): Contao\ModuleNavigation->generate()
#10 system/modules/core/pages/PageRegular.php(133): Contao\Controller::getFrontendModule(Object(Contao\ModuleModel), 'TOP')
#11 system/modules/core/controllers/FrontendIndex.php(250): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#12 index.php(20): Contao\FrontendIndex->run()
#13 {main}