reg - insufficient privilges when create view of table which resides in diff schema

schema A had tables

and it has select role

schema B (assigned schema A role to schema - i am trying to create view as select * from SCHEMA.A table   in schema B

its throwing error - insufficient privileges

however when I grant schema A table  directly to schema B am able to create view..but thru roles am  getting error.

I wanted to use roles..does anyone what is the issue?