[Bug] Finance: Handle graphql errors

[souvikbasu]

This is a
[x] bug
[ ] feature request
[ ] documentation change
[ ] build/deploy enhancement request

Description:

Steps to reproduce (in case of a bug):
Put down the graphql server on localhost and try to fetch data from the app.
The network call returns 503: Service Unavailable
The app should show an error message to the user that the data could not be fetched
Currrently the app shows blank page if there are graphql errors