Fatal error: Uncaught TypeError: imageistruecolor(): Argument #1 ($image) must be of type GdImage, bool given in /var/www/website/wp-content/plugins/timber-library/lib/Image/Operation/ToWebp.php:68 Stack trace: #0 /var/www/website/wp-content/plugins/timber-library/lib/Image/Operation/ToWebp.php(68): imageistruecolor(false) #1 /var/www/website/wp-content/plugins/timber-library/lib/ImageHelper.php(626): Timber\Image\Operation\ToWebp->run('/var/www/websit...', '/var/www/websit...') #2 /var/www/website/wp-content/plugins/timber-library/lib/ImageHelper.php(218): Timber\ImageHelper::_operate('https://karrier...', Object(Timber\Image\Operation\ToWebp), false) #3 /var/www/website/wp-content/themes/pp-karriere/src/App/Tools/PictureElement.php(261): Timber\ImageHelper::img_to_webp('https://karrier...') #4 /var/www/website/wp-content/themes/pp-karriere/src/App/Tools/PictureElement.php(176): App\Tools\PictureElement->createSrcSet() #5 /var/www/website/wp-content/themes/pp-karriere/src/App/Tools/TimberHelper.php(67): App\Tools\PictureElement->__construct(1105, NULL, NULL, 0, 0, '', '(min-width: 768...', Array, false, false, false) #6 /var/www/website/wp-content/plugins/timber-library/vendor/twig/twig/src/Environment.php(497) : eval()'d code(50): App\Tools\TimberHelper::renderPictureElement(Array) #7 /var/www/website/wp-content/plugins/timber-library/vendor/twig/twig/src/Template.php(214): __TwigTemplate_fdad6e15d0ef9cb2e66ddd1155262e35562324e1ffed6bbec6578cda9ee5aa24->block_content(Array, Array) #8 /var/www/website/wp-content/plugins/timber-library/vendor/twig/twig/src/Environment.php(497) : eval()'d code(49): Twig\Template->displayBlock('content', Array, Array) #9 /var/www/website/wp-content/plugins/timber-library/vendor/twig/twig/src/Template.php(453): __TwigTemplate_b9f455e3ad538efeb70fdaefa5b90ddf20b6b19e5aac44b48c77e528b83ed393->doDisplay(Array, Array) #10 /var/www/website/wp-content/plugins/timber-library/vendor/twig/twig/src/Template.php(420): Twig\Template->displayWithErrorHandling(Array, Array) #11 /var/www/website/wp-content/plugins/timber-library/vendor/twig/twig/src/Environment.php(497) : eval()'d code(35): Twig\Template->display(Array, Array) #12 /var/www/website/wp-content/plugins/timber-library/vendor/twig/twig/src/Template.php(453): __TwigTemplate_fdad6e15d0ef9cb2e66ddd1155262e35562324e1ffed6bbec6578cda9ee5aa24->doDisplay(Array, Array) #13 /var/www/website/wp-content/plugins/timber-library/vendor/twig/twig/src/Template.php(420): Twig\Template->displayWithErrorHandling(Array, Array) #14 /var/www/website/wp-content/plugins/timber-library/vendor/twig/twig/src/Template.php(432): Twig\Template->display(Array) #15 /var/www/website/wp-content/plugins/timber-library/vendor/twig/twig/src/TemplateWrapper.php(47): Twig\Template->render(Array, Array) #16 /var/www/website/wp-content/plugins/timber-library/lib/Loader.php(79): Twig\TemplateWrapper->render(Array) #17 /var/www/website/wp-content/plugins/timber-library/lib/Timber.php(334): Timber\Loader->render('single.html.twi...', Array, false, 'default') #18 /var/www/website/wp-content/plugins/timber-library/lib/Timber.php(383): Timber\Timber::compile('single.html.twi...', Array, false, 'default', true) #19 /var/www/website/wp-content/plugins/timber-library/lib/Timber.php(410): Timber\Timber::fetch('single.html.twi...', Array, false, 'default') #20 /var/www/website/wp-content/themes/pp-karriere/single.php(13): Timber\Timber::render('single.html.twi...', Array) #21 /var/www/website/wp-includes/template-loader.php(106): include('/var/www/websit...') #22 /var/www/website/wp-blog-header.php(19): require_once('/var/www/websit...') #23 /var/www/website/index.php(17): require('/var/www/websit...') #24 {main} thrown in /var/www/website/wp-content/plugins/timber-library/lib/Image/Operation/ToWebp.php on line 68