Fatal error: Uncaught Error: Call to a member function get_id() on null in /home/imperium/domains/imperiumgroningen.nl/public_html/wp-content/themes/nijm/woocommerce/single-product/related.php:73 Stack trace: #0 /home/imperium/domains/imperiumgroningen.nl/public_html/wp-content/plugins/woocommerce/includes/wc-core-functions.php(345): include() #1 /home/imperium/domains/imperiumgroningen.nl/public_html/wp-content/plugins/woocommerce/includes/wc-template-functions.php(1973): wc_get_template('single-product/...', Array) #2 /home/imperium/domains/imperiumgroningen.nl/public_html/wp-content/plugins/woocommerce/includes/wc-template-functions.php(1936): woocommerce_related_products(Array) #3 /home/imperium/domains/imperiumgroningen.nl/public_html/wp-includes/class-wp-hook.php(287): woocommerce_output_related_products('') #4 /home/imperium/domains/imperiumgroningen.nl/public_html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #5 /home/imperium/domains/imperiumgroningen.nl/public_html/wp-includes/plugin.ph in /home/imperium/domains/imperiumgroningen.nl/public_html/wp-content/themes/nijm/woocommerce/single-product/related.php on line 73