We just upgraded UIM hub to 20.3 (from 9.02) and when I continued with the OC upgrade, it takes a very long time to check components, and now before continuing, the discovery server address data is empty.
Release : 20.3
Component : UIM - INSTALL
1. Select the discovery_server probe
2. Rt-click on the discovery_server probe and choose Edit->Copy to clipboard
3. Copy the discovery_server NimBUS address from the results.
4. Enter the NimBUS address for the discovery_server into the installation window.
After we added the discovery_server link it completed successfully.