( ! ) Fatal error: Uncaught Hurah\Types\Exception\NullPointerException: No Course page could be found with tag 160-opencv-. in /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/src/CoursePage.php:75 Stack trace: #0 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/src/Template.php(396): Canvas\FrontendFramework\CoursePage::fromTag() #1 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/src/Template.php(196): Canvas\FrontendFramework\Template::link() #2 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/vendor/twig/twig/src/Environment.php(420) : eval()'d code(60): Canvas\FrontendFramework\Template->{closure:Canvas\FrontendFramework\Template::addFunctions():194}() #3 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/vendor/twig/twig/src/Template.php(402): __TwigTemplate_f0e1c64f260cb20424dcf8040920f4f6->doDisplay() #4 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/vendor/twig/twig/src/Environment.php(420) : eval()'d code(51): Twig\Template->yield() #5 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/vendor/twig/twig/src/Template.php(402): __TwigTemplate_def659355dfbed6663db8c9a160e3579->doDisplay() #6 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/vendor/twig/twig/src/Environment.php(420) : eval()'d code(69): Twig\Template->yield() #7 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/vendor/twig/twig/src/Template.php(402): __TwigTemplate_bfd0de7563ba225a1eeaf9a18ed1657d->doDisplay() #8 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/vendor/twig/twig/src/Template.php(358): Twig\Template->yield() #9 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/vendor/twig/twig/src/Template.php(373): Twig\Template->display() #10 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/vendor/twig/twig/src/TemplateWrapper.php(51): Twig\Template->render() #11 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/src/Template.php(513): Twig\TemplateWrapper->render() #12 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/src/CoursePage.php(206): Canvas\FrontendFramework\Template->parse() #13 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/vendor/twig/twig/src/Extension/CoreExtension.php(1911): Canvas\FrontendFramework\CoursePage->getContents() #14 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/vendor/twig/twig/src/Environment.php(420) : eval()'d code(60): Twig\Extension\CoreExtension::getAttribute() #15 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/vendor/twig/twig/src/Template.php(402): __TwigTemplate_3dd0f0c6d311d4dd8b3707c5de2bae2e->doDisplay() #16 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/vendor/twig/twig/src/Template.php(358): Twig\Template->yield() #17 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/vendor/twig/twig/src/Template.php(373): Twig\Template->display() #18 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/vendor/twig/twig/src/TemplateWrapper.php(51): Twig\Template->render() #19 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/src/Template.php(513): Twig\TemplateWrapper->render() #20 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/modules/AbstractController.php(52): Canvas\FrontendFramework\Template->parse() #21 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/modules/CoursePage/CoursePageController.php(58): Canvas\CModule\AbstractController->parse() #22 /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/public_html/index.php(34): Canvas\CModule\CoursePage\CoursePageController->run() #23 {main} Next Twig\Error\RuntimeError: An exception has been thrown during the rendering of a template ("No Course page could be found with tag 160-opencv-.") in "snippets/install-part.twig" at line 7. in /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/courses/python-computer-vision/snippets/install-part.twig on line 7
( ! ) Twig\Error\RuntimeError: An exception has been thrown during the rendering of a template ("No Course page could be found with tag 160-opencv-.") in "snippets/install-part.twig" at line 7. in /var/www/dynamic/courses.devroc.nl/releases/20251217-142120/courses/python-computer-vision/snippets/install-part.twig on line 7
Call Stack
#TimeMemoryFunctionLocation
10.0002362344{main}().../index.php:0
20.01422157664Canvas\CModule\CoursePage\CoursePageController->run().../index.php:34
30.02593573360Canvas\CModule\CoursePage\CoursePageController->parse().../CoursePageController.php:58
40.02593573360Canvas\FrontendFramework\Template->parse().../AbstractController.php:52
50.04275112224Twig\TemplateWrapper->render().../Template.php:513
60.04285112224__TwigTemplate_3dd0f0c6d311d4dd8b3707c5de2bae2e->render().../TemplateWrapper.php:51
70.04285128736__TwigTemplate_3dd0f0c6d311d4dd8b3707c5de2bae2e->display().../Template.php:373
80.04295143624__TwigTemplate_3dd0f0c6d311d4dd8b3707c5de2bae2e->doDisplay().../Template.php:358
90.04535240064Twig\Extension\CoreExtension::getAttribute().../Environment.php(420) : eval()'d code:60
100.04535240064Canvas\FrontendFramework\CoursePage->getContents().../CoreExtension.php:1911
110.04565247952Canvas\FrontendFramework\Template->parse().../CoursePage.php:206
120.04815299664Twig\TemplateWrapper->render().../Template.php:513
130.04815299664__TwigTemplate_bfd0de7563ba225a1eeaf9a18ed1657d->render().../TemplateWrapper.php:51
140.04815316176__TwigTemplate_bfd0de7563ba225a1eeaf9a18ed1657d->display().../Template.php:373
150.06045528928__TwigTemplate_f0e1c64f260cb20424dcf8040920f4f6->yield().../Template.php:358