Nah. The page wasn't missing, it just had a wrong name. I changed the permalink, and it's fixed.
The name of the Sapphire Pillar article was "sapphire-pillar-sapphire-tower-3", but the link was trying to find "sapphire-pillar-sapphire-tower". It was easy to fix.
However, if I'm to start a new article... I haven't tried that yet, but is it possible for me to load that pre-set card article template?