API Not working with ToS rankings

I wrote a website that will pull player rankings for various difficulties, metrics, and raids. Works great, but it’s not pulling results for Tomb of Sargeras with raid ID 13. The zones API call works and shows me ID of 13 for Tomb, but I get nothing back for a JSON result.

Here’s my URI https://www.warcraftlogs.com/v1/rankings/character/Syrophenikan/Bleeding-Hollow/us?metric=dps&api_key=<<<api_key>>>&zone=13&partition=2

Remove partition=2… Tomb only has one partition so far.