AppEngine source code

[Erin]

We have an AppEngine app that was written and configured by a developer who is no longer with the company (we do have his login credentials, however). The current version is running with a custom runtime and a flexible environment, and it was deployed in April of 2018.

Our problem is that we are getting various 502/nginx errors from this service and cannot seem to find the source code anywhere. When we go to the debug tab for the version, we see the following screen (see screenshot attached). Redeploying the code according to the instructions on that tab throws an error because the source code cannot be found in our local directory. 

Does anyone know if there is some way to find out how the original source code was deployed? We have of course scoured our GitLab projects and have not been able to find it.

[Katayoon (Cloud Platform Support)]

Hi Erin,

You may take a look at this and also this Stack Overflow threads, explaining how to download your App Engine flex app source code from your Cloud Build History. If the issue still persists, I recommend to open a case with your premium support package or report the issue via a PRIVATE Issue tracker and provide us with more info about your project id and your app engine service & version, so that we would be able better assist you there.