Error On Cart Page

Hi there,

When I click on my “Cart” page, I’m receiving the following error:

Warning: session_start(): Cannot send session cache limiter – headers already sent (output started at /home/hackertroyadmin/public_html/wp-content/themes/mercor/template-fullwidth-woo.php:13) in /home/hackertroyadmin/public_html/wp-content/plugins/woocommerce-checkout-manager-pro/woocommerce-checkout-manager-pro.php on line 2450

Also, the conditional price addition isn’t working for me either.

Any thoughts?

https://wordpress.org/plugins/woocommerce-checkout-manager/