2023/11/20 21:28:54 [error] 118889#118889: *5568878 FastCGI sent in stderr: "PHP message: PHP Warning: Undefined variable $coupon_agent in /www/public/wp-content/plugins/salesking/public/class-salesking-public.php on line 331" while reading response header from upstream, request: "POST /?wc-ajax=checkout HTTP/2.0", upstream: "fastcgi://unix:/var/run/php8.1-fpm.sock:", referrer: "https://example.com/checkout/"
I'm getting this error a lot in my logs.
2023/11/20 21:28:54 [error] 118889#118889: *5568878 FastCGI sent in stderr: "PHP message: PHP Warning: Undefined variable $coupon_agent in /www/public/wp-content/plugins/salesking/public/class-salesking-public.php on line 331" while reading response header from upstream, request: "POST /?wc-ajax=checkout HTTP/2.0", upstream: "fastcgi://unix:/var/run/php8.1-fpm.sock:", referrer: "https://example.com/checkout/"
Great, thank you.