Hey @minhhung0507 - quick question - what is the cluster type you're using to run your workflow?

I'm using a shared, interactive cluster, so I'm passing the parameter 

{'existing_cluster_id' : task['existing_cluster_id']}

in the payload. This parameter will change if you're using a job_cluster, I'd have to check what it's gonna be for serveless though. 

Hope it helps.

Cheers!