Call to undefined method Misha_Mailchimp_Options::add_log()

Hi Misha,

I getting the following errors when i try to process an order at the checkout in the error log file:

[17-Sep-2019 01:55:19 UTC] PHP Fatal error: Uncaught Error: Call to undefined method Misha_Mailchimp_Options::add_log() in /home2/thenutri/public_html/wp-content/plugins/true-mailchimp-sync-for-woo-memberships/class-misha-mailchimp-api.php:813
Stack trace:
#0 /home2/thenutri/public_html/wp-includes/class-wp-hook.php(286): Misha_Mailchimp_API->membership_grant_access(Object(WC_Memberships_Membership_Plan), Array)
#1 /home2/thenutri/public_html/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#2 /home2/thenutri/public_html/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
#3 /home2/thenutri/public_html/wp-content/plugins/woocommerce-memberships/includes/class-wc-memberships-membership-plan.php(1924): do_action(‘wc_memberships_…’, Object(WC_Memberships_Membership_Plan), Array)
#4 /home2/thenutri/public_html/wp-content/plugins/woocommerce-memberships/includes/class-wc-memberships-membership-plans.php(536): WC_Memberships_Membership_Plan->grant_access_from_purchase(880, 247, 9105)
#5 /home2/thenutri/public_html/wp-includes/clas in /home2/thenutri/public_html/wp-content/plugins/true-mailchimp-sync-for-woo-memberships/class-misha-mailchimp-api.php on line 813

I believe this add_log function is not defined. I fixed the issue by defining the function. Please fix this issue on your plugin.

Thanks

Regards
Nayak

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