Warning: require(./ThinkPHP/ThinkPHP.php): failed to open stream: No such file or directory in /www/wwwroot/shengli2018/index.php on line 39

Fatal error: require(): Failed opening required './ThinkPHP/ThinkPHP.php' (include_path='.:/www/server/php/54/lib/php') in /www/wwwroot/shengli2018/index.php on line 39