Warning: require(./ThinkPHP/ThinkPHP.php): failed to open stream: No such file or directory in C:\wwwroot\47.94.38.19\index.php on line 81

Fatal error: require(): Failed opening required './ThinkPHP/ThinkPHP.php' (include_path='.;C:\php\pear') in C:\wwwroot\47.94.38.19\index.php on line 81