Warning: array_push() expects parameter 1 to be array, null given in system/modules/core/vendor/tcpdf/tcpdf.php on line 16823 
#0 [internal function]: __error(2, 'array_push() ex...', '/var/www/virtua...', 16823, Array)
#1 system/modules/core/vendor/tcpdf/tcpdf.php(16823): array_push(NULL, 77)
#2 system/modules/core/vendor/tcpdf/tcpdf.php(17057): TCPDF->getHtmlDomArray(' 
generatePdf()
#5 system/modules/core/library/Contao/Controller.php(254): 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(256): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#8 index.php(440): Index->run()
#9 {main}

Warning: array_push() expects parameter 1 to be array, null given in system/modules/core/vendor/tcpdf/tcpdf.php on line 16823 
#0 [internal function]: __error(2, 'array_push() ex...', '/var/www/virtua...', 16823, Array)
#1 system/modules/core/vendor/tcpdf/tcpdf.php(16823): array_push(NULL, 135)
#2 system/modules/core/vendor/tcpdf/tcpdf.php(17057): TCPDF->getHtmlDomArray(' 
generatePdf()
#5 system/modules/core/library/Contao/Controller.php(254): 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(256): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#8 index.php(440): Index->run()
#9 {main}

Warning: array_push() expects parameter 1 to be array, null given in system/modules/core/vendor/tcpdf/tcpdf.php on line 16823 
#0 [internal function]: __error(2, 'array_push() ex...', '/var/www/virtua...', 16823, Array)
#1 system/modules/core/vendor/tcpdf/tcpdf.php(16823): array_push(NULL, 193)
#2 system/modules/core/vendor/tcpdf/tcpdf.php(17057): TCPDF->getHtmlDomArray(' 
generatePdf()
#5 system/modules/core/library/Contao/Controller.php(254): 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(256): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#8 index.php(440): Index->run()
#9 {main}

Warning: array_push() expects parameter 1 to be array, null given in system/modules/core/vendor/tcpdf/tcpdf.php on line 16823 
#0 [internal function]: __error(2, 'array_push() ex...', '/var/www/virtua...', 16823, Array)
#1 system/modules/core/vendor/tcpdf/tcpdf.php(16823): array_push(NULL, 251)
#2 system/modules/core/vendor/tcpdf/tcpdf.php(17057): TCPDF->getHtmlDomArray(' 
generatePdf()
#5 system/modules/core/library/Contao/Controller.php(254): 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(256): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#8 index.php(440): Index->run()
#9 {main}

Warning: array_push() expects parameter 1 to be array, null given in system/modules/core/vendor/tcpdf/tcpdf.php on line 16823 
#0 [internal function]: __error(2, 'array_push() ex...', '/var/www/virtua...', 16823, Array)
#1 system/modules/core/vendor/tcpdf/tcpdf.php(16823): array_push(NULL, 309)
#2 system/modules/core/vendor/tcpdf/tcpdf.php(17057): TCPDF->getHtmlDomArray(' 
generatePdf()
#5 system/modules/core/library/Contao/Controller.php(254): 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(256): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#8 index.php(440): Index->run()
#9 {main}

Warning: Invalid argument supplied for foreach() in system/modules/core/vendor/tcpdf/tcpdf.php on line 19281 
#0 system/modules/core/vendor/tcpdf/tcpdf.php(19281): __error(2, 'Invalid argumen...', '/var/www/virtua...', 19281, Array)
#1 system/modules/core/vendor/tcpdf/tcpdf.php(18121): TCPDF->closeHTMLTagHandler(Array, 367, 0, 62.916666666667)
#2 system/modules/core/modules/ModuleArticle.php(371): TCPDF->writeHTML(' 

#0 system/modules/core/vendor/tcpdf/tcpdf.php(19313): __error(2, 'Invalid argumen...', '/var/www/virtua...', 19313, Array)
#1 system/modules/core/vendor/tcpdf/tcpdf.php(18121): TCPDF->closeHTMLTagHandler(Array, 367, 0, 62.916666666667)
#2 system/modules/core/modules/ModuleArticle.php(371): TCPDF->writeHTML('