internetsaint on "[Plugin: NextScripts: Social Networks Auto-Poster] Notice: Undefined index: nMin"

I m using wordpress 4.5.3 and i m using button theme . When i publish the post , i m receiving this errors.

Notice: Undefined index: nMin in /home/a306824e/public_html/wp-content/plugins/social-networks-auto-poster-facebook-twitter-g/NextScripts_SNAP.php on line 129

Notice: Undefined index: nHrs in /home/a306824e/public_html/wp-content/plugins/social-networks-auto-poster-facebook-twitter-g/NextScripts_SNAP.php on line 129

Notice: Undefined index: nTime in /home/a306824e/public_html/wp-content/plugins/social-networks-auto-poster-facebook-twitter-g/NextScripts_SNAP.php on line 129

Notice: Undefined index: nMin in /home/a306824e/public_html/wp-content/plugins/social-networks-auto-poster-facebook-twitter-g/NextScripts_SNAP.php on line 129

Notice: Undefined index: nHrs in /home/a306824e/public_html/wp-content/plugins/social-networks-auto-poster-facebook-twitter-g/NextScripts_SNAP.php on line 129

Notice: Undefined index: nTime in /home/a306824e/public_html/wp-content/plugins/social-networks-auto-poster-facebook-twitter-g/NextScripts_SNAP.php on line 129

Waing: Cannot modify header information - headers already sent by (output started at /home/a306824e/public_html/wp-content/plugins/social-networks-auto-poster-facebook-twitter-g/NextScripts_SNAP.php:129) in /home/a306824e/public_html/wp-admin/post.php on line 197

Waing: Cannot modify header information - headers already sent by (output started at /home/a306824e/public_html/wp-content/plugins/social-networks-auto-poster-facebook-twitter-g/NextScripts_SNAP.php:129) in /home/a306824e/public_html/wp-includes/pluggable.php on line 1167

Please help me to fix this.

https://wordpress.org/plugins/social-networks-auto-poster-facebook-twitter-g/