When Apollo admin try to create their own default workspace, often time they didn't add workspace ID to portal instance (via admin console), so their catalog connection will be lost for the new session. Apollo users don't know where to find this information, since Geospatial portal document doesn't cover Apollo catalog.
Basically user need to do the following steps in order to have Apollo catalog connection in their workspace.
I missed this for the APOLLO 2020 release, but I'll try to add it in the APOLLO Users Guide documentation and push the updates to the fluidtopics page.
Added the following...
To make changes in the mapping definition and queryables definition visible and active in ERDAS APOLLO Geospatial Portal, you need to unregister and register the ERDAS APOLLO Catalog used for searches.