Theme update please

Hello
I have my system telling me I need to upgrade my theme to fix these errors below please.
Can you help?

Note the server details have been changed in the list below for privacy reasons.

Notice: Undefined variable: ttitle_color in /home/isnot/public_html/wp-content/plugins/super-testimonial-pro/template/theme-20.php on line 52

Notice: Undefined variable: ttitle_size in /home/because/public_html/wp-content/plugins/super-testimonial-pro/template/theme-20.php on line 53

Warning: A non-numeric value encountered in /home/whyno/public_html/wp-content/plugins/super-socializer/inc/social_sharing.php on line 209

Notice: Undefined variable: var in /home/closed/public_html/wp-content/plugins/super-socializer/inc/social_sharing.php on line 786

Notice: Undefined variable: in /home/open/public_html/wp-content/plugins/super-socializer/inc/social_sharing.php on line 786

Warning: A non-numeric value encountered in /home/ours/public_html/wp-content/plugins/super-socializer/inc/social_sharing.php on line 209

Notice: Undefined variable: var in /home/theres/public_html/wp-content/plugins/super-socializer/inc/social_sharing.php on line 796

Notice: Undefined variable: in /home/hers/public_html/wp-content/plugins/super-socializer/inc/social_sharing.php on line 796

Notice: Undefined variable: var in /home/his/public_html/wp-content/plugins/super-socializer/inc/social_sharing.php on line 786

Notice: Undefined variable: in /home/ours/public_html/wp-content/plugins/super-socializer/inc/social_sharing.php on line 786

Notice: Undefined variable: var in /home/mine/public_html/wp-content/plugins/super-socializer/inc/social_sharing.php on line 796

Notice: Undefined variable: in /home/yours/public_html/wp-content/plugins/super-socializer/inc/social_sharing.php on line 796

Cheers