Thing not showing up in Add Tile Inventory List

I added a new Thing to my SmartThings setup. It shows up and works in my SmartThings app, but I can't see it in my ActionTiles Inventory, even after I hit Reload App...?

ActionTiles only has access to the Things that you Authorize via:

• Add Location (+) or
• My Locations > [your Location] > AUTHORIZE or
• using the SmartThings Classic App: Automation / SmartApps > "ActionTiles V6 (Connect)" > select Things > Save.
• using the SmartThings new (Samsung Connect App): ...

If a Thing is missing from the list presented on the SmartThings Authorization Page, please see:

• https://support.actiontiles.com/knowledge-bases/8/articles/363-some-devices-are-missing-from-the-authorize-things-add-location-screen
• https://support.actiontiles.com/knowledge-bases/8/articles/3556-compatible-smartthings-capabilities-device-type-abstractions