The checker is disabled by the checker system at the moment because the challenge attribute is still missing on the listing.
The checker system has changed to automatic disabling due to the change of the guidelines
2.12.1. Type, Title, and Attribute
Challenge caches must be listed as Mystery caches, must have the English word "challenge" in the title, and must include the challenge cache attribute.
Please place the attribute on the listing so I can enable the checker again