Crash in LightmapSettings::GetLightingDataAsset() after assertion failure 'settings != null'

In the attached project, when the user exits Play Mode in the gameplay scene, Unity will report an assertion failure and then crash as follows. This issue cannot be remedied by a re-import or clearing Library, it will resurface.Without a debug version of the editor, a meaningless callstack will reported.

[00:00:00] Enlighten: Finished 1 Layout Systems job (0.00s execute, 0.00s integrate, 0.22s wallclock)
[00:00:00] Enlighten: Finished 1 Tetrahedralize Probes job (0.00s execute, 0.00s integrate, 0.05s wallclock)
[00:00:00] Enlighten: Precompute took 0.267668 seconds.
Enlighten scene contents: 0 geometries. 0 instances. 0 systems. 0 probe groups. 0 cube maps. Scene is up-to-date.
[PathTracer] building lightmap data asset.
[00:00:01] Enlighten: Reflection Probes started.
[00:00:01] Enlighten: Finished 1 Bake Ambient Probe job (0.00s execute, 0.00s integrate, 0.05s wallclock)
[PathTracer] building lightmap data asset.
[00:00:01] Enlighten: LightingDataAsset started.
Assertion failed on expression: 'settings != NULL'
(Filename: ./Editor/Src/GI/Enlighten/LightingDataAsset.cpp Line: 328)
Obtained 28 stack frames.
#0 0x00000110f14a54 in LightmapSettings::GetLightingDataAsset() const
#1 0x00000112469271 in LightingDataAsset::GetLightingDataAssetStableID(UnityScene*)
#2 0x000001124e9a2f in WriteLightingDataAssetJob::Prepare(dynamic_array<UnityGUID, 0ul>&)
#3 0x00000112418486 in IssueWriteLightingDataAssetJob(JobManager*, dynamic_array<UnityGUID, 0ul>&, Hash128 const&)
#4 0x000001124196d1 in LightingDataAssetManager::PostUpdate()
#5 0x000001123fe87c in gi::PostUpdate(dynamic_array<GISceneManagerClient*, 0ul> const&)
#6 0x0000011240a50a in GISceneManager::Update()
#7 0x0000011240839d in GISceneManager::GISceneManager()::tickGIInEditorRegistrator::Forward()
#8 0x0000010e932962 in CallbackArray::Invoke()
#9 0x0000010f126faf in ProfilerCallbackInvoke<CallbackArray, &(GlobalCallbacks::tickGIInEditor)>::Invoke(char const*)
#10 0x0000010f123b36 in Application::TickTimer()
#11 0x00000112abbfa5 in -[EditorApplication TickTimer]
#12 0x007fff3a0148b3 in __NSFireTimer
#13 0x007fff37947704 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__
#14 0x007fff379472be in __CFRunLoopDoTimer
#15 0x007fff37946cde in __CFRunLoopDoTimers
#16 0x007fff37927b0d in __CFRunLoopRun
#17 0x007fff37926fe3 in CFRunLoopRunSpecific
#18 0x007fff364ae67d in RunCurrentEventLoopInMode
#19 0x007fff364ae3bd in ReceiveNextEventCommon
#20 0x007fff364ae147 in _BlockUntilNextEventMatchingListInModeWithFilter
#21 0x007fff34b33864 in _DPSNextEvent
#22 0x007fff34b325d4 in -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:]
#23 0x007fff34b2cd76 in -[NSApplication run]
#24 0x007fff34b1e95d in NSApplicationMain
#25 0x00000112afd78f in EditorMain(int, char const**)
#26 0x00000112afda99 in main
#27 0x007fff6ec682e5 in start
Launching bug reporter
[Unity Package Manager (Upm)]
Parent process [1662] was terminated
QObject: Cannot create children for a parent that is in a different thread.
(Parent is QNetworkAccessManager(0x7fd8ba73e3c0), parent's thread is QThread(0x7fd8ba604740), current thread is Thread(0x7fd87aad9410)

Steps to reproduce:
- Download and launch the attached project in 19.3+
- Install the required assets from the asset store: Photon Unity Networking 2 and Photo Voice 2
- Configure Photon and Photo voice with the IDs attached to this Fogbugz ticket as a comment for security (Window > Photon Unity Networking > Hightlight Server Settings > Settings > App Id Realtime and App Id Voice)
- Launch the /ICT/Scenes/Lobby scene
- Create a new profile
- Create a new room
- When arriving in the gameplay scene, move the player around the scene for a short period
- Exit play mode
- Observe crash as described