Matillion global Pub Sub not posting messages to topics when pipeline is triggered manually

Hi All,

I'm trying to post manually triggered pipline run status (success / failure) notification to slack and email using matillion global pub sub by triggering cloud function.

I'm triggering matillion pipeline manually but I'm not getting success / failure messages on my topics.

I have configured my matillion pub/sub and I get "Success" when I test configuration.

Also I get success / failure messages on topics when I trigger matillion pipeline through pub / sub but not when I trigger it manually. 

Can someone please help me with same?