Issue: we are upgrading the product from 8.5.1 to 9.0.2 but during upgrade it fails at Step 8: restarting server
Release : 9.0.2
Component : UIM - INSTALL
Hub 7.9x was in place and crashing when LDAP query was run, likely due to a bug in this branch of hub.
After disabling LDAP the upgrade completed successfully and could be re-enabled once hub/robot 9.30 were in place after the 20.1 upgrade.