I am trying to set up a tile server with Mapnik, renderd, mod_tile and with MapBox Outdoors style. I've been able to successfully go through https://switch2osm.org/serving-tiles/manually-building-a-tile-server-14-04/ tutorial and set up the server with OSM-Bright style.
Next I changed renderd.conf file and pointed the 'XML' property the 'project.xml' file from MapBox Outdoors style which I previously downloaded from Github. I've also cleared the cache, restarted renderd and apache but the new style does not work - there are only empty tiles rendered.
Is there something that I'm doing wrong? What is the proper way to apply Outdoors style?