There seems to be a problem with the settings.
When using “Scheduled time occurs…” without specifying a task, it appears that a “Run script” is generated for each task in the project.
After consulting with Copilot, I was able to get it working correctly.
The key points are:
Scheduled execution
↓
Create a task using Asana standard actions
↓
Script Action
↓
Update the description field with updateTask()
This might be the key point.
It passed the test, so I will leave it running like this for a while.