Error when run rest API in IIS

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I have a Rest API using NET5 and I want to host it in IIS. But after created new website in IIS, it is error HTTP Error 500.30 - ASP.NET Core app failed to start[^] when I run

What I have tried:

I open logs file and see the error System.PlatformNotSupportedException[^]
Anyone have idea about it. Please advice.

Updated: I also config in IIS as picture below
https://i.stack.imgur.com/NZFQ9.png[^]

Posted 2-Mar-23 19:56pm

huynhminh97

Updated 2-Mar-23 20:39pm

v2

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OriginalGriff · Answer 1 · 2023-03-02T20:20:00

Solution 1

It means that whatever version of .NET you built the project for is not installed or supported on the web server.

Talk to the tech support people at your hosting service - they can tell you what versions they support or make recommendations as to when they may be able to support your requirements.

Posted 2-Mar-23 20:20pm

OriginalGriff

Comments

huynhminh97 3-Mar-23 2:27am

Hi @OriginalGriff, If calling API with localhost, it will run normal. This problem only occurs when I host it IIS then run website with IP and port

OriginalGriff 3-Mar-23 3:18am

Yes, because your local computer has the right framework installed.

But the production server doesn't - so it throws an error saying just that.
Talk to the tech support / admin of your ISS host - we can't do that for you!

RickZeeland · Answer 2 · 2023-03-02T20:32:00

Solution 2

In addition to Griffs advice, if you are self-hosting IIS you probably need to install the ASP.NET Core Runtime 5 Hosting Bundle:
Download .NET 5.0 (Linux, macOS, and Windows)[^]

Or maybe you can try this: publish-net-core-5-0-api-to-iis[^]

Also make sure to follow the steps mentioned here:
Publish an ASP.NET Core app to IIS | Microsoft Learn[^]

Posted 2-Mar-23 20:32pm

RickZeeland

Updated 2-Mar-23 23:06pm

v3

Comments

huynhminh97 3-Mar-23 2:36am

@RickZeeland. It's unlucky, I also already installed ASP.NET Core Runtime 5 Hosting Bundle