#0 [internal function]: __error(2, 'imagecolortrans...', '/home/pipp/doma...', 324, Array)
#1 system/modules/core/library/Contao/Image.php(324): imagecolortransparent(false)
#2 system/modules/core/library/Contao/Controller.php(1608): Contao\Image::get('files/Zdjecia n...', '400', '300', 'proportional')
#3 system/modules/core/modules/ModuleArticle.php(281): Contao\Controller->replaceInsertTags('\n
#0 [internal function]: __error(2, 'imagecolorstota...', '/home/pipp/doma...', 327, Array)
#1 system/modules/core/library/Contao/Image.php(327): imagecolorstotal(false)
#2 system/modules/core/library/Contao/Controller.php(1608): Contao\Image::get('files/Zdjecia n...', '400', '300', 'proportional')
#3 system/modules/core/modules/ModuleArticle.php(281): Contao\Controller->replaceInsertTags('\n
#0 [internal function]: __error(2, 'Cannot modify h...', '/home/pipp/doma...', 7693, Array)
#1 vendor/tecnick.com/tcpdf/tcpdf.php(7693): header('Content-Descrip...')
#2 system/modules/core/modules/ModuleArticle.php(386): TCPDF->Output('archiwum.pdf', 'D')
#3 system/modules/core/library/Contao/Controller.php(386): Contao\ModuleArticle->generatePdf()
#4 system/modules/core/library/Contao/Controller.php(268): Contao\Controller::getArticle(Object(Contao\ArticleModel), false, false, 'main')
#5 system/modules/core/pages/PageRegular.php(138): Contao\Controller::getFrontendModule('0', 'main')
#6 index.php(260): Contao\PageRegular->generate(Object(Contao\PageModel), true)
#7 index.php(444): Index->run()
#8 {main}
TCPDF ERROR: Some data has already been output to browser, can't send PDF file