My test invocation name is "Mrs Tang", so i input "Talk to Mrs Tang", but it responds "Sorry, this action is not available in simulation"...
Does anybody know How can I resolve this error?
According to the doc:
Turn on the Web & App Activity, Device Information, and Voice & Audio Activity permissions on the Activity controls page for your Google account. You need to do this to use the Actions Simulator, which lets you test your actions on the web without a hardware device.
And I had do what Jeremy Gordon suggested. To add a second google account in the GCP IAM console with a viewer action permission and then login with this second google account in an incognito window for the web simulator to work.