Warning: imagepng(): Invalid 2nd parameter, it must a filename or a stream in vendor/tecnickcom/tcpdf/include/tcpdf_images.php on line 128
#0 [internal function]: __error(2, 'imagepng(): Inv...', 'vendo...', 128, Array)
#1 vendor/tecnickcom/tcpdf/include/tcpdf_images.php(128): imagepng(Resource id #115, false)
#2 vendor/tecnickcom/tcpdf/tcpdf.php(7046): TCPDF_IMAGES::_toPNG(Resource id #115, false)
#3 vendor/tecnickcom/tcpdf/tcpdf.php(18900): TCPDF->Image('assets/contao/i...', 15, 271.76111777778, 5.08, 5.08, 'gif', '', 'B', false, 300, '', false, false, 0, false, false, true)
#4 vendor/tecnickcom/tcpdf/tcpdf.php(18286): TCPDF->openHTMLTagHandler(Array, 92, 0)
#5 system/modules/core/modules/ModuleArticle.php(388): TCPDF->writeHTML(' 
#0 [internal function]: __error(2, 'unlink(): No su...', 'vendo...', 134, Array) #1 vendor/tecnickcom/tcpdf/include/tcpdf_images.php(134): unlink('') #2 vendor/tecnickcom/tcpdf/tcpdf.php(7046): TCPDF_IMAGES::_toPNG(Resource id #115, false) #3 vendor/tecnickcom/tcpdf/tcpdf.php(18900): TCPDF->Image('assets/contao/i...', 15, 271.76111777778, 5.08, 5.08, 'gif', '', 'B', false, 300, '', false, false, 0, false, false, true) #4 vendor/tecnickcom/tcpdf/tcpdf.php(18286): TCPDF->openHTMLTagHandler(Array, 92, 0) #5 system/modules/core/modules/ModuleArticle.php(388): TCPDF->writeHTML('
#0 [internal function]: __error(2, 'Cannot modify h...', 'vendo...', 7647, Array) #1 vendor/tecnickcom/tcpdf/tcpdf.php(7647): header('Content-Descrip...') #2 system/modules/core/modules/ModuleArticle.php(392): TCPDF->Output('infos-zur-veran...', 'D') #3 system/modules/core/library/Contao/Controller.php(390): 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