Find Path to Location Sync - Works 'as Standalone', but not 'as Client'

Any idea why this block works fine in ‘NetMode - Standalone’ but throws a blueprint error while in “NetMode - Play as Client” ?

The error is: “Blueprint Runtime Error: “Accessed None trying to read property CallFunc_FindPathToLocationSynchronously_ReturnValue”. Node: Set NavPathPoints Graph: EventGraph Function: Execute Ubergraph BP Top Down Controller Blueprint: BP_TopDownController”

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Downloaded the source and build a custom version to trace though the differences. Eventually narrowed it down to a checkbox in Project Settings → Engine → Navigation → “Allow Client Side Navigation”.
PITA, but it works now :face_with_spiral_eyes:

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