Fatal error: Uncaught Error: Call to undefined function SendinblueWoocommerce\Managers\is_checkout() in /customers/e/b/4/jornboyenielsen.dk/httpd.www/wp-content/plugins/woocommerce-sendinblue-newsletter-subscription/src/managers/admin-manager.php:101 Stack trace: #0 /customers/e/b/4/jornboyenielsen.dk/httpd.www/wp-includes/class-wp-hook.php(324): SendinblueWoocommerce\Managers\AdminManager->brevo_hook_javascript_footer('') #1 /customers/e/b/4/jornboyenielsen.dk/httpd.www/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #2 /customers/e/b/4/jornboyenielsen.dk/httpd.www/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #3 /customers/e/b/4/jornboyenielsen.dk/httpd.www/wp-includes/general-template.php(3208): do_action('wp_footer') #4 /customers/e/b/4/jornboyenielsen.dk/httpd.www/wp-content/themes/twentyseventeen/footer.php(48): wp_footer() #5 /customers/e/b/4/jornboyenielsen.dk/httpd.www/wp-includes/template.php(810): require_once('/customers/e/b/...') #6 /customers/e/b/4/jornboyenielsen.dk/httpd.www/wp-includes/template.php(745): load_template('/customers/e/b/...', true, Array) #7 /customers/e/b/4/jornboyenielsen.dk/httpd.www/wp-includes/general-template.php(92): locate_template(Array, true, true, Array) #8 /customers/e/b/4/jornboyenielsen.dk/httpd.www/wp-content/themes/twentyseventeen/single.php(49): get_footer() #9 /customers/e/b/4/jornboyenielsen.dk/httpd.www/wp-includes/template-loader.php(106): include('/customers/e/b/...') #10 /customers/e/b/4/jornboyenielsen.dk/httpd.www/wp-blog-header.php(19): require_once('/customers/e/b/...') #11 /customers/e/b/4/jornboyenielsen.dk/httpd.www/index.php(17): require('/customers/e/b/...') #12 {main} thrown in /customers/e/b/4/jornboyenielsen.dk/httpd.www/wp-content/plugins/woocommerce-sendinblue-newsletter-subscription/src/managers/admin-manager.php on line 101