Can't start emby server after update

[mjdbb1 6]

It appears that my installation of emby server downloaded an update (I got a notice to restart the server).  However the app will no longer start at all.  I see the following error in event viewer every time I try:

Description: A .NET application failed.
Application: EmbyServer.exe
Path: C:\Users\nuc\AppData\Roaming\Emby-Server\system\EmbyServer.exe
Message: Failed to load System.Private.CoreLib.dll (error code 0x80070002)
Path: C:\Users\nuc\AppData\Roaming\Emby-Server\system\System.Private.CoreLib.dll
Error message: 
Failed to create CoreCLR, HRESULT: 0x80070002

Any idea what might have happened?  I tried to restore a backup of my 'programdata' folder in case it was corrupted but that did not help.

Also - log is attached.  It appears each time I try to launch it generates another like like this one.  

embyserver-63903493891.txt

Edited January 8 by mjdbb1
added log

[Luke 42077]

Hi, please try installing the update from our website on top of our existing version. Let us know if that helps. Thanks.

[mjdbb1 6]

Unfortunately this did not works. It installs successfully but still won’t start up. Same error logs. 

[Luke 42077]

2 hours ago, mjdbb1 said:

Unfortunately this did not works. It installs successfully but still won’t start up. Same error logs. 

OK then please try again in this sequence:

• Make sure the server is shutdown
• Delete the folder C:\Users\nuc\AppData\Roaming\Emby-Server\programdata\updates
• installing the update from our website on top of our existing version

[mjdbb1 6]

Thank you!  This worked.  Any idea what might have happened to cause this?

[Luke 42077]

Hi, it's hard to say but something was keeping a hold on files and preventing them from being updated.