Understanding the CSS Background properties


Fatal error: Uncaught TypeError: Illegal offset type in isset or empty in /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box/inc/fields/choice.php:67 Stack trace: #0 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box/inc/field.php(535): RWMB_Choice_Field::format_single_value(Array, Array, '', NULL) #1 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-views/src/Fields/Choice/Renderer.php(11): RWMB_Field::call('format_single_v...', Array, Array, '', NULL) #2 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-views/src/Fields/BaseRenderer.php(15): MBViews\Fields\Choice\Renderer::get_single_value(Array) #3 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-views/src/Fields/BaseRenderer.php(11): MBViews\Fields\BaseRenderer::get_clone_value(Array) #4 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-views/src/Renderer/MetaBox.php(70): MBViews\Fields\BaseRenderer::parse(Array, Array) #5 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-views/src/Renderer/MetaBox.php(28): MBViews\Renderer\MetaBox->parse_field_value(Array, Array) #6 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-views/src/Renderer/Post.php(26): MBViews\Renderer\MetaBox->get_data(Object(RW_Meta_Box), 'post', 14518) #7 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-views/src/Renderer/Post.php(15): MBViews\Renderer\Post->get_fields() #8 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-views/src/Renderer/Base.php(21): MBViews\Renderer\Post->get_data() #9 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/elightup/twig/Twig/Extension/CoreExtension.php(1604): MBViews\Renderer\Base->__get('title') #10 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/elightup/twig/Twig/Environment.php(358) : eval()'d code(42): elightup_twig_get_attribute(Object(eLightUp\Twig\Environment), Object(eLightUp\Twig\Source), Object(MBViews\Renderer\Post), 'title', Array, 'any', false, false, false, 4) #11 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/elightup/twig/Twig/Template.php(394): __TwigTemplate_24f0994ba10c20e4d6ce7c9d012deb51->doDisplay(Array, Array) #12 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/elightup/twig/Twig/Template.php(367): eLightUp\Twig\Template->displayWithErrorHandling(Array, Array) #13 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/elightup/twig/Twig/Template.php(379): eLightUp\Twig\Template->display(Array) #14 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/elightup/twig/Twig/TemplateWrapper.php(40): eLightUp\Twig\Template->render(Array, Array) #15 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/elightup/twig/Twig/Environment.php(277): eLightUp\Twig\TemplateWrapper->render(Array) #16 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-views/src/Renderer.php(72): eLightUp\Twig\Environment->render('15741', Array) #17 /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box-aio/vendor/meta-box/mb-views/views/template.php(16): MBViews\Renderer->render(Object(WP_Post)) #18 /srv/users/techandchess/apps/wpstudio/public/wp-includes/template-loader.php(106): include('/srv/users/tech...') #19 /srv/users/techandchess/apps/wpstudio/public/wp-blog-header.php(19): require_once('/srv/users/tech...') #20 /srv/users/techandchess/apps/wpstudio/public/index.php(17): require('/srv/users/tech...') #21 {main} thrown in /srv/users/techandchess/apps/wpstudio/public/wp-content/plugins/meta-box/inc/fields/choice.php on line 67