Warning: require(//wp-includes/class-wp-theme-json-schema.php): failed to open stream: No such file or directory in /wp-settings.php on line 173

Warning: require(//wp-includes/class-wp-theme-json-schema.php): failed to open stream: No such file or directory in /wp-settings.php on line 173

Fatal error: require(): Failed opening required '//wp-includes/class-wp-theme-json-schema.php' (include_path='.:/:/usr/local/php7/lib/pear') in /wp-settings.php on line 173