9 beta, alerts always "Unknown"

Hi,

I updated to 9 beta because the alerts, but I cannot get it to trigger them. My docker compose.yml is:

Anything I am missing?

Thanks

Do alert queries use parameters?

No, they dont. I created some simple ones for the test. Suddenly yesterday a lot of notifications arrived to slack and email. I think it is kinda working but I will test more today.

Do I need to have the scheduler in the compose file? Because it is working with:
image

Redash works without the scheduler. It just won’t schedule any background tasks.