I gone through following solution as well..no success
esg123692 (DM_SESSION_E_SETUP_ROLES_FOR_RPC or DM_GROUP_E_PROTECTED_ROLE_UNKNOWN_CLIENT while creating or applying the retention policies) and let us know if it assists. Thank you for your co-operation.
1. Ignore all objects while installing (each artifacts of DAR through composer).
2. Thought of lifecycle expecting retention policies on target (as I do not find any option of moving retention policies through composer), so created manually retention policy on target. But no success.
3. Made dmc_rps_escalated_retmgr as public manually through DA , before installation. Still same error.