Warning: array_push() expects parameter 1 to be array, null given in system/modules/core/vendor/tcpdf/tcpdf.php on line 16765
#0 [internal function]: __error(2, 'array_push() ex...', 'system/mo...', 16765, Array)
#1 system/modules/core/vendor/tcpdf/tcpdf.php(16765): array_push(NULL, 72)
#2 system/modules/core/vendor/tcpdf/tcpdf.php(16999): TCPDF->getHtmlDomArray(' 
generatePdf() #5 system/modules/core/library/Contao/Controller.php(225): Contao\Controller->getArticle(Object(Contao\ArticleModel), false, false, 'main') #6 system/modules/core/pages/PageRegular.php(138): Contao\Controller->getFrontendModule('0', 'main') #7 index.php(250): Contao\PageRegular->generate(Object(Contao\PageModel), true) #8 index.php(415): Index->run() #9 {main}
TCPDF ERROR: Some data has already been output, can't send PDF file