Fatal error: Uncaught TypeError: Timber\Term::__toString(): Return value must be of type string, null returned in /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/plugins/mo-core-functionality/lib/vendor/timber/timber/lib/Term.php:82 Stack trace: #0 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/plugins/mo-core-functionality/lib/vendor/twig/twig/src/Extension/CoreExtension.php(1221): Timber\Term->__toString() #1 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/plugins/mo-core-functionality/lib/vendor/twig/twig/src/Environment.php(418) : eval()'d code(44): twig_test_empty() #2 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/plugins/mo-core-functionality/lib/vendor/twig/twig/src/Template.php(405): __TwigTemplate_e0ac4212a731d202c0898af578af2e645d6f609f727899c5a610b15cca89d32b->doDisplay() #3 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/plugins/mo-core-functionality/lib/vendor/twig/twig/src/Template.php(378): Twig\Template->displayWithErrorHandling() #4 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/plugins/mo-core-functionality/lib/vendor/twig/twig/src/Environment.php(418) : eval()'d code(38): Twig\Template->display() #5 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/plugins/mo-core-functionality/lib/vendor/twig/twig/src/Template.php(405): __TwigTemplate_fc36848e06e701e1ff9a3478bdbda5791aae83e99164c615ffe07870fea7ef72->doDisplay() #6 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/plugins/mo-core-functionality/lib/vendor/twig/twig/src/Template.php(378): Twig\Template->displayWithErrorHandling() #7 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/plugins/mo-core-functionality/lib/vendor/twig/twig/src/Template.php(390): Twig\Template->display() #8 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/plugins/mo-core-functionality/lib/vendor/twig/twig/src/TemplateWrapper.php(45): Twig\Template->render() #9 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/plugins/mo-core-functionality/lib/vendor/timber/timber/lib/Loader.php(79): Twig\TemplateWrapper->render() #10 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/plugins/mo-core-functionality/lib/vendor/timber/timber/lib/Timber.php(334): Timber\Loader->render() #11 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/plugins/mo-core-functionality/lib/vendor/timber/timber/lib/Timber.php(383): Timber\Timber::compile() #12 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/plugins/mo-core-functionality/lib/vendor/timber/timber/lib/Timber.php(410): Timber\Timber::fetch() #13 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/themes/urbanraum/footer.php(15): Timber\Timber::render() #14 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-includes/template.php(770): require_once('...') #15 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-includes/template.php(716): load_template() #16 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-includes/general-template.php(92): locate_template() #17 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/plugins/the-events-calendar/src/views/v2/default-template.php(21): get_footer() #18 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-includes/template-loader.php(106): include('...') #19 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-blog-header.php(19): require_once('...') #20 /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/index.php(17): require('...') #21 {main} thrown in /mnt/web403/b2/21/56731221/htdocs/STRATO-apps/wordpress_01/app/wp-content/plugins/mo-core-functionality/lib/vendor/timber/timber/lib/Term.php on line 82