Fatal error: Cannot redeclare block_core_navigation_submenu_build_css_colors() (previously declared in /var/www/vhosts/wisvo.nl/httpdocs/wp-includes/deprecated.php:5325) in /var/www/vhosts/wisvo.nl/httpdocs/wp-includes/blocks/navigation-submenu.php on line 76

Fatal error: Uncaught Error: Call to a member function set() on null in /var/www/vhosts/wisvo.nl/httpdocs/wp-includes/l10n.php:850 Stack trace: #0 /var/www/vhosts/wisvo.nl/httpdocs/wp-includes/l10n.php(953): load_textdomain() #1 /var/www/vhosts/wisvo.nl/httpdocs/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain() #2 [internal function]: WP_Fatal_Error_Handler->handle() #3 {main} thrown in /var/www/vhosts/wisvo.nl/httpdocs/wp-includes/l10n.php on line 850