Notice: require_once(): Read of 11313 bytes failed with errno=12 Cannot allocate memory in /var/www/vhosts/degrotenieuwbouwgids.nl/httpdocs/wp-includes/nav-menu-template.php on line 11

Fatal error: Uncaught Error: Failed opening required '/var/www/vhosts/degrotenieuwbouwgids.nl/httpdocs/wp-includes/class-walker-nav-menu.php' (include_path='.:/opt/alt/php83/usr/share/pear:/opt/alt/php83/usr/share/php:/usr/share/pear:/usr/share/php') in /var/www/vhosts/degrotenieuwbouwgids.nl/httpdocs/wp-includes/nav-menu-template.php:11
Stack trace:
#0 /var/www/vhosts/degrotenieuwbouwgids.nl/httpdocs/wp-settings.php(277): require()
#1 /var/www/vhosts/degrotenieuwbouwgids.nl/httpdocs/wp-config.php(102): require_once('/var/www/vhosts...')
#2 /var/www/vhosts/degrotenieuwbouwgids.nl/httpdocs/wp-load.php(50): require_once('/var/www/vhosts...')
#3 /var/www/vhosts/degrotenieuwbouwgids.nl/httpdocs/wp-blog-header.php(13): require_once('/var/www/vhosts...')
#4 /var/www/vhosts/degrotenieuwbouwgids.nl/httpdocs/index.php(17): require('/var/www/vhosts...')
#5 {main}
  thrown in /var/www/vhosts/degrotenieuwbouwgids.nl/httpdocs/wp-includes/nav-menu-template.php on line 11

Fatal error: Uncaught Error: Call to a member function set() on null in /var/www/vhosts/degrotenieuwbouwgids.nl/httpdocs/wp-includes/l10n.php:856
Stack trace:
#0 /var/www/vhosts/degrotenieuwbouwgids.nl/httpdocs/wp-includes/l10n.php(959): load_textdomain()
#1 /var/www/vhosts/degrotenieuwbouwgids.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/degrotenieuwbouwgids.nl/httpdocs/wp-includes/l10n.php on line 856