Model import has not been attempted

What causes this issue?

Before search connectors can be created, the underlying model data needs
to be imported. This import has not yet run.

System Response

Enterprise Search is not set up, search is not possible.

How to fix this error?

Use task list (transaction STC01) SAP_ESH_INITIAL_SETUP_WRK_CLIENT to
trigger the import.
You can also start the ES-Cockpit (transaction ESH_COCKPIT), which will
likewise trigger the import.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.