I’ve been developing a new hosting environment that uses Nginx and I came across an issue with Artio JoomSEF. Whenever I switched on the plugin the site would die and display:
500 – Unable to load renderer class
This ended up being a problem with Artio itself. Version 3.5.3 of Artio JoomSEF doesn’t work properly. Upgrading Artio solved this issue. Hopefully this will save other people from spending a lot of time trying to find issues in their code or configs.