Fatal error: Uncaught Error: Class 'WP_REST_Server' not found in /home/pfupdate/public_html/wp-includes/rest-api.php:494 Stack trace: #0 /home/pfupdate/public_html/wp-includes/rest-api.php(332): rest_get_server() #1 /home/pfupdate/public_html/wp-includes/class-wp-hook.php(287): rest_api_loaded(Object(WP)) #2 /home/pfupdate/public_html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #3 /home/pfupdate/public_html/wp-includes/plugin.php(544): WP_Hook->do_action(Array) #4 /home/pfupdate/public_html/wp-includes/class-wp.php(388): do_action_ref_array('parse_request', Array) #5 /home/pfupdate/public_html/wp-includes/class-wp.php(745): WP->parse_request('') #6 /home/pfupdate/public_html/wp-includes/functions.php(1285): WP->main('') #7 /home/pfupdate/public_html/wp-blog-header.php(16): wp() #8 /home/pfupdate/public_html/index.php(17): require('/home/pfupdate/...') #9 {main} thrown in /home/pfupdate/public_html/wp-includes/rest-api.php on line 494