I get the 503 Backend fetch failed error when I try to connect to my Magento backend that is hosted on a AWS Lightsail Instance – 2 GB RAM, 1 vCPU, 60 GB SSD. I found the general tutorial on how to fix it https://devdocs.magento.com/guides/v2.3/config-guide/varnish/tshoot-varnish-503.html, but the path described there […]