Disable CloudFlare APO on subdomain

Hi. I was using CloudFlare APO on my static website and it was working very well but when we recently installed WooCommerce and CartFlow Pro on a subdomain, we were facing Session Timeout Error after enabling CloudFlare APO on the installation. I only want to disable CloudFlare APO on the subdomain. I’ve already tried uninstalling plugin but that’s not working for me. Please guide me.