Deployment Launcher Editor window throws a NullReferenceException

[jamiebrynes7]

Affects: Release v0.2.2 and up
Internal Ticket: UTY-2046

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Description

The Deployment Launcher Window throws a NRE with a stack trace similar to the following:

NullReferenceException: Object reference not set to an instance of an object
UnityEditor.GameObjectInspector.ClearPreviewCache () (at C:/buildslave/unity/build/Editor/Mono/Inspector/GameObjectInspector.cs:203)
UnityEditor.GameObjectInspector.OnDisable () (at C:/buildslave/unity/build/Editor/Mono/Inspector/GameObjectInspector.cs:191)
UnityEditor.AssetDatabase:SaveAssets()
Improbable.Gdk.DeploymentLauncher.DeploymentLauncherWindow:OnEnable() (at Packages/com.improbable.gdk.deploymentlauncher/DeploymentLauncherWindow.cs:61)

This seemingly can happen randomly, even when not in use, provided that the Editor window is open.

Workaround

This error appears to be harmless and can be ignored.