Before doing any kind of changes to code, you'd want to check your logs 
<> first, which will 
often give a helpful stack trace to show where the error originated. On a 
standard runtime instance you can view the request logs, and on a flexible 
instance you can also view other logs like stderr, crash.log, and vm.syslog 
which can help troubleshoot deployment errors.

On Monday, October 17, 2016 at 4:00:27 PM UTC-4, Roger wrote:
> After uploading an app that was working before, this error results:*Error: 
> Server Error*
> *The server encountered an error and could not complete your request.*
> *Please try again in 30 seconds.*
> To trace it down, I removed almost all code, and still get the error.
> In the console, it says:  
> *This app has no instances deployed.*
> Anyone can help?

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