CODEWITHSUNDEEP
asp.netiisweb-configblazor
Panayiotis Paddy Paschalides
Panayiotis Paddy Paschalides

Reputation: 63

Blazor Hosted (ASP.NET) HTTP Error 500.19 - Internal Server Error

From what I understand this error occurs when the web.config is not configured properly. However when I publish the app the following web.config gets generated 

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <location path="." inheritInChildApplications="false">
    <system.webServer>
      <handlers>
        <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModuleV2" resourceType="Unspecified" />
      </handlers>
      <aspNetCore processPath=".\Lotus.Server.exe" stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" hostingModel="inprocess" />
    </system.webServer>
  </location>
</configuration>
<!--ProjectGuid: 85a43eb6-3576-401d-b025-a15a2cc377b6-->

I first thought of installing URL Rewrite, this did not solve the problem. I am stressing out have tried almost everything any ideas on how to resolve it?

The error page looks like this:

enter image description here

Upvotes: 6

Views: 15658

Answers (5)

Zangana
Zangana

Reputation: 1

At the beginning I was getting only 500 then I install all the components of IIS then I got 500.19. I installed Microsoft Rewrite Module it fixed my problem.

Upvotes: 0

cebilon
cebilon

Reputation: 187

I had this same problem and I was trying to fix it for 4 days. Then I found the solution.

Firstly you need to download dotnet hosting

https://learn.microsoft.com/en-us/aspnet/core/host-and-deploy/iis/hosting-bundle?view=aspnetcore-7.0#direct-download-current-version

Then after instalation try to restart IIS with cmd (run as admin and then write iisreset). If error page has changed we are going in good direction :)

Now it should say that you are using wrong module (which indeed is true).

Open IIS, get to your website and check installed modules. On list you should be able to see AspNetCoreModule but not AspNetCoreModuleV2.

go to: %ProgramFiles%\IIS\Asp.Net Core Module\V2
and copy aspnetcorev2.dll

Then go into %SystemRoot%\system32\inetsrv\ and paste it

Now after this, open config folder in %SystemRoot%\system32\inetsrv\ and then open applicationHost.

IMPORTANT At this stage you need to turn off your iis

Now find this line:

<add name="AspNetCoreModule" image="%SystemRoot%\system32\inetsrv\aspnetcore.dll" />

and add under it:

<add name="AspNetCoreModuleV2" image="%SystemRoot%\system32\inetsrv\aspnetcorev2.dll" />

And this same goes with this one:

<add name="AspNetCoreModule" />

add under it:

<add name="AspNetCoreModuleV2" />

Now save it, overwrite old one, and enable IIS. Go to your website, check modules and at the list you should be able to see AspNetCoreModuleV2:

[AspNetCoreModule and AspNetCoreModuleV2 on list][1] [1]: https://i.sstatic.net/jC0JC.png

Upvotes: 10

jon morgan
jon morgan

Reputation: 329

This had me scratching my head for a while as everything was working fine on LocalHost - the error occured on the production server.

After rebuilding the site I realised that I had deleted the site folder on the production server along with its contents.

When I replaced the site I had posted it to my server node without recreating the site folder, so obviously the server couldn't access my web.config file as it was unbable to find the site folder.

Lesson learnt! Hope it saves other running down the 500.19 rabbit hole.

Upvotes: 1

onejbsmith
onejbsmith

Reputation: 21

Fixed this by changing "AspNetCoreModuleV2" to "AspNetCoreModule" in the generated web.config in my publish folder, i.e., from

<add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModuleV2" resourceType="Unspecified" />

to

<add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified" />

Upvotes: 2

Daniel
Daniel

Reputation: 2998

For me It was lacking the Url Rewrite Module

https://www.freecodecamp.org/news/how-to-deploy-a-blazor-application-on-internet-information-services-iis-f96f2969fdcb/

Upvotes: 6

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