Hi ainul.
In order for me to help in the future, please post the actual text into the channel instead of the screenshots. That way we can more easily copy/paste the code and help you debug. If you want to share code you can use the markdown syntax to give the code proper highlighting too. You can read more about that syntax here. We also have a guide on how to ask great questions that gives me details on this feature.
A few quick things:
- Your custom action code seems to be missing, could you share it again?
- Are you sure your custom action server is up and running?