At 2. Display Markers on Map :: Jmix Documentation there is the complete XML view location-lookup-view.xml shown.
Unfortunatly the dataLoadCoordinator
Facet is missing in this code.
<facets>
<dataLoadCoordinator auto="true"/>
</facets>
If a beginner is just pasting this code, he will not see the locations as promised ;(
Regards
Felix