2019.2.0f1 Facebook/SDK .dll not registered console errors on editor start.

Upgraded a project to 2019.2.0f1 from 2018.3.0f2 and now receive the following 4 errors in the console each time the project is started from UnityHub. They readily clear and cause no observable issues, however, my attempts to fix this issue are ineffective to date.

Extension C:/Repos/2019.2.0f1/Editor/Data/PlaybackEngines/Facebook/SDK/7.9.4/Facebook.Unity.Arcade.dll was not registered, that means it relies on default UnityExtensions settings, please register extension and apply necessary settings for it in the callback.

Extension C:/Repos/2019.2.0f1/Editor/Data/PlaybackEngines/Facebook/SDK/7.9.4/Facebook.Unity.Settings.dll was not registered, that means it relies on default UnityExtensions settings, please register extension and apply necessary settings for it in the callback.

Extension C:/Repos/2019.2.0f1/Editor/Data/PlaybackEngines/Facebook/SDK/7.9.4/Facebook.Unity.dll was not registered, that means it relies on default UnityExtensions settings, please register extension and apply necessary settings for it in the callback.

Extension C:/Repos/2019.2.0f1/Editor/Data/PlaybackEngines/Facebook/SDK/7.9.4/FacebookNamedPipeClient.dll was not registered, that means it relies on default UnityExtensions settings, please register extension and apply necessary settings for it in the callback.

Ineffective fixes attempted include:

Running the executable "UnitySetup-Facebook-Games-Support-for-Editor-2019.2.0f1.exe"

From the command prompt (Windows 10, 64 bit):

"sfc /scannow" to fix any corrupt files - ran successfully.

C:\Windows\SysWOW64\REGSVR32 C:/Repos/2019.2.0f1/Editor/Data/PlaybackEngines/Facebook/SDK/7.9.4/Facebook.Unity.Arcade.dll

...and for good measure:

regsvr32 C:/Repos/2019.2.0f1/Editor/Data/PlaybackEngines/Facebook/SDK/7.9.4/Facebook.Unity.Arcade.dll

Tried on each of the above 4 .dll files that are "not registered". This included trying to un-register them first with the /U switch and then registering them. Each of these attempts is greeted with the below popup.



Any ideas on next steps or what might the issue be? Thanks!