Restart Instance " Object reference not set to an instance of an object." Error.

[Denise Barakah Lawrence]

My Developers Computer crashed at the wrong moment:(

I've restarted instances before with no problem, however...this is what happened when I reinstated the instance this time.  Any help?

I appreciate it.

[Olu]

It is not straight forward to determine the root cause of this issue from the UI error as you have displayed. The error reported in the Screenshot is simply a NullReference Exception which could result from other reasons, including wrong Source code implementation. 

My recommendation is to check the Stackdriver logs to understand the underlying issue. You can access the Stackdriver logs of your application using this link. 

Please provide the errors reported in the logs to give better context to this issue observed.