wpeinstieg

Hello,
I have finally managed to find the error.
The plugin “PayPal PLUS for WooCommerce” is clearly the source of the error.
I would like to thank you very much for your support.
Have a nice weekend.
Best regards
Frank Borgmann

How much would it cost me if you solved the problem for me?

The following message is displayed and indicates an error with the WooCommerce plugin

Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class WC_Session_Handler does not have a method “nonce_user_logged_out” in /var/www/web4/htdocs/wp-includes/class-wp-hook.php:326 Stack trace: #0 /var/www/web4/htdocs/wp-includes/plugin.php(205): WP_Hook->apply_filters() #1 /var/www/web4/htdocs/wp-includes/pluggable.php(2382): apply_filters() #2 /var/www/web4/htdocs/wp-content/plugins/elementor/core/documents-manager.php(279): wp_verify_nonce() #3 /var/www/web4/htdocs/wp-content/plugins/elementor/includes/frontend.php(1097): Elementor\Core\Documents_Manager->get_doc_for_frontend() #4 /var/www/web4/htdocs/wp-content/plugins/elementor/includes/frontend.php(1063): Elementor\Frontend->get_builder_content() #5 /var/www/web4/htdocs/wp-includes/class-wp-hook.php(324): Elementor\Frontend->apply_builder_in_content() #6 /var/www/web4/htdocs/wp-includes/plugin.php(205): WP_Hook->apply_filters() #7 /var/www/web4/htdocs/wp-includes/post-template.php(256): apply_filters() #8 /var/www/web4/htdocs/wp-content/plugins/woocommerce/templates/single-product/tabs/description.php(30): the_content() #9 /var/www/web4/htdocs/wp-content/plugins/woocommerce/includes/wc-core-functions.php(346): include(‘…’) #10 /var/www/web4/htdocs/wp-content/plugins/woocommerce/includes/wc-template-functions.php(2080): wc_get_template() #11 /var/www/web4/htdocs/wp-content/plugins/woocommerce/templates/single-product/tabs/tabs.php(47): woocommerce_product_description_tab() #12 /var/www/web4/htdocs/wp-content/plugins/woocommerce/includes/wc-core-functions.php(346): include(‘…’) #13 /var/www/web4/htdocs/wp-content/plugins/woocommerce/includes/wc-template-functions.php(1808): wc_get_template() #14 /var/www/web4/htdocs/wp-includes/class-wp-hook.php(324): woocommerce_output_product_data_tabs() #15 /var/www/web4/htdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #16 /var/www/web4/htdocs/wp-includes/plugin.php(517): WP_Hook->do_action() #17 /var/www/web4/htdocs/wp-content/plugins/woocommerce/templates/content-single-product.php(72): do_action() #18 /var/www/web4/htdocs/wp-includes/template.php(812): require(‘…’) #19 /var/www/web4/htdocs/wp-content/plugins/woocommerce/includes/wc-core-functions.php(285): load_template() #20 /var/www/web4/htdocs/wp-content/plugins/woocommerce/templates/single-product.php(37): wc_get_template_part() #21 /var/www/web4/htdocs/wp-includes/template-loader.php(106): include(‘…’) #22 /var/www/web4/htdocs/wp-blog-header.php(19): require_once(‘…’) #23 /var/www/web4/htdocs/index.php(17): require(‘…’) #24 {main} thrown in /var/www/web4/htdocs/wp-includes/class-wp-hook.php on line 326

WordPress menu opens on smartphones only after 2 tapsThe WordPress menu does not open after one tap. You have to tap it 2 times for it to open. An example: https://www.stark-boxing.de/Several visitors of this website told me this. Different smartphones were used.