Warning: Use of undefined constant BE_USER_LOGGED_IN - assumed 'BE_USER_LOGGED_IN' (this will throw an Error in a future version of PHP) in system/modules/core/models/PageModel.php on line 335 
#0 system/modules/core/models/PageModel.php(335): __error(2, 'Use of undefine...', '/mnt/web115/e3/...', 335, Array)
#1 system/modules/cookiebar/classes/CookieBar.php(93): Contao\PageModel::findFirstPublishedRootByHostAndLanguage('www.greta-ag.de', 'en')
#2 system/modules/core/controllers/FrontendIndex.php(384): Contao\CookieBar->modifyCacheKey('www.greta-ag.de...')
#3 system/modules/core/controllers/FrontendIndex.php(28): Contao\FrontendIndex->outputFromCache()
#4 index.php(19): Contao\FrontendIndex->__construct()
#5 {main}

Warning: Cannot modify header information - headers already sent by (output started at /mnt/web115/e3/29/51424829/htdocs/greta_contao/system/helper/functions.php:65) in system/modules/core/library/Contao/Template.php on line 294 
#0 [internal function]: __error(2, 'Cannot modify h...', '/mnt/web115/e3/...', 294, Array)
#1 system/modules/core/library/Contao/Template.php(294): header('Vary: User-Agen...', false)
#2 system/modules/core/classes/FrontendTemplate.php(121): Contao\Template->output()
#3 system/modules/core/pages/PageRegular.php(190): Contao\FrontendTemplate->output(true)
#4 system/modules/core/controllers/FrontendIndex.php(285): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#5 index.php(20): Contao\FrontendIndex->run()
#6 {main}

Warning: Cannot modify header information - headers already sent by (output started at /mnt/web115/e3/29/51424829/htdocs/greta_contao/system/helper/functions.php:65) in system/modules/core/library/Contao/Template.php on line 295 
#0 [internal function]: __error(2, 'Cannot modify h...', '/mnt/web115/e3/...', 295, Array)
#1 system/modules/core/library/Contao/Template.php(295): header('Content-Type: t...')
#2 system/modules/core/classes/FrontendTemplate.php(121): Contao\Template->output()
#3 system/modules/core/pages/PageRegular.php(190): Contao\FrontendTemplate->output(true)
#4 system/modules/core/controllers/FrontendIndex.php(285): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#5 index.php(20): Contao\FrontendIndex->run()
#6 {main}
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