In RoleBinding resource, roleRef and subjects don't have "namespace" field as they should exist in same namespace as the RoleBinding, therefore only RoleBinding can have "namespace" field. Otherwise error:
Error: unable to build kubernetes objects from release manifest: error validating "": error validating data: ValidationError(RoleBinding.roleRef): unknown field "namespace" in io.k8s.api.rbac.v1beta1.RoleRef
In RoleBinding resource, roleRef and subjects don't have "namespace" field as they should exist in same namespace as the RoleBinding, therefore only RoleBinding can have "namespace" field. Otherwise error:
Error: unable to build kubernetes objects from release manifest: error validating "": error validating data: ValidationError(RoleBinding.roleRef): unknown field "namespace" in io.k8s.api.rbac.v1beta1.RoleRef