I use free subscription ID.
I made LUIS resource and region was 'Asia Regions'.
When I entered LUIS.ai homepage, there was a westus starter key.
I added 'Asia Regions' key in the 'Publish' tab and entered model ID and subscription key into my code.
But it didn't work.
Only 'North America Regions' starter key worked.
I want to use asia key which I made in Azure portal.
How can I use this key?
It looks like you are using the endpoint directly from the publish without adding query which is giving you null result.
If you are constructing your endpoint URLs for your LUIS-calling application, make sure these same routes and query string values are set for the endpoint used -- if you want them set as mentioned here.