unable to load app 0 (mountpoint='') (callable not found or import error)

[ICUMD]

Has anyone been able to run this on kubernetes. I am running it on google managed kubernetes. The only error log I see is unable to load app 0 (mountpoint='') (callable not found or import error). Also for some reason I see this log marked as error nginx: configuration file /app/nginx.conf test is successful.
I am using a managed cloud sql postgres instance as backend database with alerta version 9.0.3. The database communication is fine since I see the users created from environment variables.

When I open the UI , I see this popup

Environment:

• OS: Debian GNU/Linux 10
• API version: docker-alerta 9.0.3
• Deployment: Google managed kubernetes
• Database: Google managed postgres