Fatal error: Uncaught Error: Call to undefined function wp_cache_add_multiple() in /wp-includes/meta.php:1200 Stack trace: #0 /wp-includes/meta.php(644): update_meta_cache('user', Array) #1 /wp-includes/meta.php(571): get_metadata_raw('user', 1, 'wp_capabilities', true) #2 /wp-includes/user.php(1143): get_metadata('user', 1, 'wp_capabilities', true) #3 /wp-includes/class-wp-user.php(878): get_user_meta(1, 'wp_capabilities', true) #4 /wp-includes/class-wp-user.php(853): WP_User->get_caps_data() #5 /wp-includes/class-wp-user.php(177): WP_User->for_site('') #6 /wp-includes/pluggable.php(116): WP_User->init(Object(stdClass)) #7 /wp-includes/pluggable.php(84): get_user_by('id', 1) #8 /wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-connection/src/class-manager.php(765): get_userdata(1) #9 /wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-connection/src/class-manager.php(701): Automattic\Jetpack\Connection\Manager->get_connection_owner() #10 /wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack- in /wp-includes/meta.php on line 1200