Oracle Error ORA-28168: attempted to grant password-protected role

Oracle Error Message

ORA-28168: attempted to grant password-protected role

Reason for the Error

An ALTER USER … GRANT CONNECT command was attempted specifying a role that is protected by a password as a role which the proxy may execute on behalf of a client.

Solution

Either specify a role that does not have a password or alter the role so that a password is not required.