An error occurred while starting the application. .NET Core X86 v4.1.1.0 | Microsoft.AspNetCore.Hosting version 1.1.1 | Microsoft Windows 6.2.9200

Question

User1164381444 posted

I've been building an ASP.NET Core app (1.1) and deploying it to an Azure instance I've had for a while.

Everything was working fine, then suddenly I deploy and get this error when I navigate to the site:

An error occurred while starting the application.

.NET Core X86 v4.1.1.0    |   Microsoft.AspNetCore.Hosting version 1.1.1    |    Microsoft Windows 6.2.9200    |   Need help? 

The publish succeeds (as it has) in the past.

I had read via this post on StackOverflow that it's helpful to connect via FTP and delete everything in "Site/wwwroot" but when I attempted to FTP to the instance I was unable to connect.

Any ideas on how to troubleshoot this instance?

I'd be fine with a way to "reset" it because it's not in production yet and I can just deploy my code to it and be back where I want to be. :)

Answer 1

User527778624 posted

Hi,

You can check error logs and even edit your files using Azure SCM (kudu):

https://blogs.msdn.microsoft.com/benjaminperkins/2014/03/24/using-kudu-with-windows-azure-web-sites/

//and google for Azure SCM to find more links

Answer 2

User1328880122 posted

I also have the same problem ... any real leads on how to fix this ? 

Trying to deploy a solution that work just fine on my dev computer but when i deploy doesn't work at all and no error message whatsoever ...

Answer 3

User-1849651236 posted

Hello,

I have this same exact problem today.  I am using Visual Studio 2017 Community.  The publish procedure says: "========== Publish: 1 succeeded, 0 failed, 0 skipped =========="

Did you ever find a soltion for this problem?

Thanks,
Tony

Answer 4

User1852039331 posted

Is happening for me too.

Answer 5

User1289604957 posted

Hello,

Before doing a publish, please make sure you choose Release, build for Release mode then do your publish.

Best regards,

Maher

Answer 6

User-1759322447 posted

In my case, I am using swagger and in my release build I was not creating the XML documentation file.

Answer 7

User-1254954967 posted

This was exactly my problem as well. Thank you for posting your response. That could have been tough to figure out.

Answer 8

User-973886032 posted

Hello,

Before doing a publish, please make sure you choose Release, build for Release mode then do your publish.

Best regards,

Maher

How do you choose your release and build for release ? I cant seem to find that ?

Answer 9

User-1268825352 posted

In my case, I am using swagger and in my release build I was not creating the XML documentation file.

Thank you, i still had no clue what was wrong after half a day of frustration.

This was also the solution for me...