Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, string given in /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-content/plugins/facebook-button-plugin/facebook-button-plugin.php:813 Stack trace: #0 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-content/plugins/facebook-button-plugin/facebook-button-plugin.php(813): in_array() #1 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/class-wp-hook.php(324): fcbkbttn_display_button() #2 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/plugin.php(205): WP_Hook->apply_filters() #3 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/formatting.php(3992): apply_filters() #4 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/class-wp-hook.php(324): wp_trim_excerpt() #5 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/plugin.php(205): WP_Hook->apply_filters() #6 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/post-template.php(434): apply_filters() #7 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-content/plugins/wordpress-seo/src/helpers/post-helper.php(84): get_the_excerpt() #8 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-content/plugins/wordpress-seo/src/presentations/indexable-post-type-presentation.php(196): Yoast\WP\SEO\Helpers\Post_Helper->get_the_excerpt() #9 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php(66): Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation->generate_open_graph_description() #10 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-content/plugins/wordpress-seo/src/presenters/open-graph/description-presenter.php(33): Yoast\WP\SEO\Presentations\Abstract_Presentation->__get() #11 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-content/plugins/wordpress-seo/src/presenters/abstract-indexable-tag-presenter.php(37): Yoast\WP\SEO\Presenters\Open_Graph\Description_Presenter->get() #12 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-content/plugins/wordpress-seo/src/integrations/front-end-integration.php(409): Yoast\WP\SEO\Presenters\Abstract_Indexable_Tag_Presenter->present() #13 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/class-wp-hook.php(324): Yoast\WP\SEO\Integrations\Front_End_Integration->present_head() #14 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #15 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/plugin.php(517): WP_Hook->do_action() #16 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-content/plugins/wordpress-seo/src/integrations/front-end-integration.php(383): do_action() #17 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/class-wp-hook.php(324): Yoast\WP\SEO\Integrations\Front_End_Integration->call_wpseo_head() #18 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #19 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/plugin.php(517): WP_Hook->do_action() #20 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/general-template.php(3052): do_action() #21 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-content/themes/sydney/header.php(17): wp_head() #22 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/template.php(790): require_once('...') #23 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/template.php(725): load_template() #24 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/general-template.php(48): locate_template() #25 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-content/themes/sydney/single.php(8): get_header() #26 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-includes/template-loader.php(106): include('...') #27 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-blog-header.php(19): require_once('...') #28 /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/index.php(17): require('...') #29 {main} thrown in /var/www/vhosts/web7.host.knuba.de/html/stefan-brunner.com/wp-content/plugins/facebook-button-plugin/facebook-button-plugin.php on line 813