Plugin could not be activated because it triggered a fatal error.

I have updated the plugin today and got following errors.

Warning: require(includes/sfba-enqueue-scripts.php): failed to open stream: No such file or directory in /home/globalhe/public_html/wp-content/plugins/wp-subscribe-form/index.php on line 14

Warning: require(includes/sfba-enqueue-scripts.php): failed to open stream: No such file or directory in /home/globalhe/public_html/wp-content/plugins/wp-subscribe-form/index.php on line 14

Fatal error: require(): Failed opening required ‘includes/sfba-enqueue-scripts.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/globalhe/public_html/wp-content/plugins/wp-subscribe-form/index.php on line 14

Thanks