generatePdf()
#5 system/modules/core/library/Contao/Controller.php(277): Contao\Controller::getArticle(Object(Contao\ArticleModel), false, false, 'main')
#6 system/modules/core/pages/PageRegular.php(133): Contao\Controller::getFrontendModule('0', 'main')
#7 system/modules/core/controllers/FrontendIndex.php(285): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#8 index.php(20): Contao\FrontendIndex->run()
#9 {main}
Warning: Invalid argument supplied for foreach() in
vendor/tecnickcom/tcpdf/tcpdf.php on line
19508
#0 vendor/tecnickcom/tcpdf/tcpdf.php(19508): __error(2, 'Invalid argumen...', '/var/www/www.si...', 19508, Array)
#1 vendor/tecnickcom/tcpdf/tcpdf.php(18290): TCPDF->closeHTMLTagHandler(Array, 80, 0, 252.35834533333)
#2 system/modules/core/modules/ModuleArticle.php(388): TCPDF->writeHTML('
#0 vendor/tecnickcom/tcpdf/tcpdf.php(19537): __error(2, 'count(): Parame...', '/var/www/www.si...', 19537, Array)
#1 vendor/tecnickcom/tcpdf/tcpdf.php(18290): TCPDF->closeHTMLTagHandler(Array, 80, 0, 252.35834533333)
#2 system/modules/core/modules/ModuleArticle.php(388): TCPDF->writeHTML('
#0 vendor/tecnickcom/tcpdf/tcpdf.php(19540): __error(2, 'Invalid argumen...', '/var/www/www.si...', 19540, Array)
#1 vendor/tecnickcom/tcpdf/tcpdf.php(18290): TCPDF->closeHTMLTagHandler(Array, 80, 0, 252.35834533333)
#2 system/modules/core/modules/ModuleArticle.php(388): TCPDF->writeHTML('
#0 [internal function]: __error(2, 'Cannot modify h...', '/var/www/www.si...', 7646, Array)
#1 vendor/tecnickcom/tcpdf/tcpdf.php(7646): header('Content-Descrip...')
#2 system/modules/core/modules/ModuleArticle.php(392): TCPDF->Output('fester.pdf', 'D')
#3 system/modules/core/library/Contao/Controller.php(399): Contao\ModuleArticle->generatePdf()
#4 system/modules/core/library/Contao/Controller.php(277): Contao\Controller::getArticle(Object(Contao\ArticleModel), false, false, 'main')
#5 system/modules/core/pages/PageRegular.php(133): Contao\Controller::getFrontendModule('0', 'main')
#6 system/modules/core/controllers/FrontendIndex.php(285): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#7 index.php(20): Contao\FrontendIndex->run()
#8 {main}
TCPDF ERROR: Some data has already been output to browser, can't send PDF file