When Spotlight is connected to the database, there are many yellow triangles indicating issues.
When clicking the triangle, the following error appears:
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Component: Database writer
Message:
Unable to obtain the ILinqDelegateFactory
Source: "SystemEvent" table
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This can happen if a more recent version of Spotlight on Oracle was installed over / into the same directory as an older version of Spotlight.
Uninstall Spotlight on Oracle, then re-install it into a completely new directory