Hello debasis,
The message error says:
Access denied (Object(s): portal_content/com.test.TEST_SYS
I saw you checked the permissions for pcd:portal_content but have you checked the permissions for portal_content/com.test.TEST_SYS?
It might be the system landscape you created doesn't have the right permission or is not inheriting the permission from portal_content anymore.
Regards,
Fabricio