Mail Cron causes issue. Caused by Post SMTP?

I’m running into some issues with an abandoned cart plugin that sends out emails to people that have left items in their cart. Every day or so, I get an email notifying me of errors around the same time with the following error log:

Error Details
=============
An error of type E_ERROR was caused in line 110 of the file /home/username/public_html/wp-content/plugins/woocommerce-abandoned-cart-recovery/includes/email/send-email-cron.php. Error message: Uncaught Error: Call to a member function get_name() on boolean in /home/username/public_html/wp-content/plugins/woocommerce-abandoned-cart-recovery/includes/email/send-email-cron.php:110
Stack trace:
#0 /home/username/public_html/wp-content/plugins/woocommerce-abandoned-cart-recovery/includes/email/send-email-cron.php(67): WACVP\Inc\Email\Send_Email_Cron->email_content(Object(stdClass), ‘26719’)
#1 /home/username/public_html/wp-includes/class-wp-hook.php(288): WACVP\Inc\Email\Send_Email_Cron->send_reminder_mail(”)
#2 /home/username/public_html/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(”, Array)
#3 /home/username/public_html/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#4 /home/username/public_html/wp-content/plugins/woocommerce-abandoned-cart-recovery/includes/cron.php(51): do_action(‘wacv_cron_send_…’)
#5 /home/username/public_html/wp-includes/class-wp-hook.php(288): WACVP\Inc\Cron->wacv_execute_cron()
#6 /home/username/public_html/wp-includes/class-wp-hook.php(312): WP_Hook->

I’ve reached out to the developers and they say that this issue is caused by cron and not by their plugin, which makes me wonder, since it is related to the mail sending, could something be caused by Post SMTP? Is there a way to troubleshoot this further?