My website breaks after installing plugin

After installing the plugin, my website breaks, and show the errors below. If I delete the clever-mega-menu folder from plugin folder, the site returns to normal. Anyone know how to fix this?

Thanks!

Warning: require(__DIR__/includes/class-leafo-scss-compiler.php) [function.require]: failed to open stream: No such file or directory in /home/storage/7/cc/25/bolsine2/public_html/wp-content/plugins/clever-mega-menu/clever-mega-menu.php on line 398

Warning: require(__DIR__/includes/class-leafo-scss-compiler.php) [function.require]: failed to open stream: No such file or directory in /home/storage/7/cc/25/bolsine2/public_html/wp-content/plugins/clever-mega-menu/clever-mega-menu.php on line 398

Fatal error: require() [function.require]: Failed opening required '__DIR__/includes/class-leafo-scss-compiler.php' (include_path='.:/usr/share/pear') in /home/storage/7/cc/25/bolsine2/public_html/wp-content/plugins/clever-mega-menu/clever-mega-menu.php on line 398