Fatal error: Uncaught Error: Call to a member function get_default_language() on null in /data01/virt88847/domeenid/www.hannu-pro.ee/htdocs/wp-content/plugins/woocommerce-multilingual/inc/class-wcml-upgrade.php:854 Stack trace: #0 /data01/virt88847/domeenid/www.hannu-pro.ee/htdocs/wp-content/plugins/woocommerce-multilingual/inc/class-wcml-upgrade.php(125): WCML_Upgrade->upgrade_4_11_0() #1 /data01/virt88847/domeenid/www.hannu-pro.ee/htdocs/wp-includes/class-wp-hook.php(324): WCML_Upgrade->run('') #2 /data01/virt88847/domeenid/www.hannu-pro.ee/htdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #3 /data01/virt88847/domeenid/www.hannu-pro.ee/htdocs/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #4 /data01/virt88847/domeenid/www.hannu-pro.ee/htdocs/wp-settings.php(695): do_action('init') #5 /data01/virt88847/domeenid/www.hannu-pro.ee/htdocs/wp-config.php(175): require_once('/data01/virt888...') #6 /data01/virt88847/domeenid/www.hannu-pro.ee/htdocs/wp-load.php(50): require_once('/data01/virt888...') #7 /data01/virt88847/domeenid/www.hannu-pro.ee/htdocs/wp-blog-header.php(13): require_once('/data01/virt888...') #8 /data01/virt88847/domeenid/www.hannu-pro.ee/htdocs/index.php(17): require('/data01/virt888...') #9 {main} thrown in /data01/virt88847/domeenid/www.hannu-pro.ee/htdocs/wp-content/plugins/woocommerce-multilingual/inc/class-wcml-upgrade.php on line 854