[.NetCore 3.x] [.Net 5 RTM] Single File for OpenMU target 3.1 app, launch failed

[jiangzeng01]

Application Name: OpenMU
OS: Windows 10 RS5
CPU: X64
.NET Build Number: 5.0.100-rc.2.20471.7
App Location: \appcompatsrv\Appcompat\DotNetCore\AppSource\SingleFileP0AppsTarget5\Apps\OpenMU-3.1
App Source: \appcompatsrv\Appcompat\DotNetCore\AppSource\SingleFileP0AppsTarget5\AppSources\OpenMU-3.1
DevDiv bug: https://devdiv.visualstudio.com/DevDiv/_workitems/edit/1217878

Repro steps:
Build with default 3.x
Single File exe was created by
dotnet publish MUnique.OpenMU.Startup.csproj -r win-x64 -p:PublishSingleFile=true --self-contained true
using 5.0.100-rc.2.20471.7 SDK

Copy '\appcompatsrv\Appcompat\DotNetCore\AppSource\SingleFileP0AppsTarget5\Apps\OpenMU-3.1' to local machine.
Double-click on MUnique.OpenMU.Startup.exe
Access "localhost:1234/admin"

Expected Result:
Open OpenMU app, "localhost:1234/admin" page will be open successful.

Actual Result:
The "localhost:1234/admin" page unable to be opened and get exception.

Findings:
The Framework-Dependency and Self-contained app can be launched. But the Single file unable to launch.
Checked Event view, there is no errors in Event View.

Exception from command window:

21797 [1] DEBUG Microsoft.AspNetCore.Hosting.Diagnostics (null) - Hosting starting
22132 [1] DEBUG Microsoft.AspNetCore.SignalR.Internal.DefaultHubProtocolResolver (null) - Registered SignalR Protocol: json, implemented by Microsoft.AspNetCore.SignalR.Protocol.JsonHubProtocol.
22594 [1] INFO Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager (null) - User profile is available. Using 'C:\Users\appcompat\AppData\Local\ASP.NET\DataProtection-Keys' as key repository and Windows DPAPI to encrypt keys at rest.
22605 [1] DEBUG Microsoft.AspNetCore.DataProtection.Repositories.FileSystemXmlRepository (null) - Reading data from file 'C:\Users\appcompat\AppData\Local\ASP.NET\DataProtection-Keys\key-030abbaa-d964-428b-a8bb-c3d2dfad120f.xml'.
22635 [1] DEBUG Microsoft.AspNetCore.DataProtection.Repositories.FileSystemXmlRepository (null) - Reading data from file 'C:\Users\appcompat\AppData\Local\ASP.NET\DataProtection-Keys\key-3e574b2f-9f85-42d5-8f7e-c8146cbf85c9.xml'.
22655 [1] DEBUG Microsoft.AspNetCore.DataProtection.Repositories.FileSystemXmlRepository (null) - Reading data from file 'C:\Users\appcompat\AppData\Local\ASP.NET\DataProtection-Keys\key-58d9fd3c-a653-4837-9fa8-0bcedbe6e183.xml'.
22677 [1] DEBUG Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager (null) - Found key {030abbaa-d964-428b-a8bb-c3d2dfad120f}.
22679 [1] DEBUG Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager (null) - Found key {3e574b2f-9f85-42d5-8f7e-c8146cbf85c9}.
22680 [1] DEBUG Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager (null) - Found key {58d9fd3c-a653-4837-9fa8-0bcedbe6e183}.
22697 [1] DEBUG Microsoft.AspNetCore.DataProtection.KeyManagement.DefaultKeyResolver (null) - Considering key {3e574b2f-9f85-42d5-8f7e-c8146cbf85c9} with expiration date 2020-12-15 09:25:13Z as default key.
22712 [1] DEBUG Microsoft.AspNetCore.DataProtection.TypeForwardingActivator (null) - Forwarded activator type request from Microsoft.AspNetCore.DataProtection.XmlEncryption.DpapiXmlDecryptor, Microsoft.AspNetCore.DataProtection, Version=3.1.7.0, Culture=neutral, PublicKeyToken=adb9793829ddae60 to Microsoft.AspNetCore.DataProtection.XmlEncryption.DpapiXmlDecryptor, Microsoft.AspNetCore.DataProtection, Culture=neutral, PublicKeyToken=adb9793829ddae60
22719 [1] DEBUG Microsoft.AspNetCore.DataProtection.XmlEncryption.DpapiXmlDecryptor (null) - Decrypting secret element using Windows DPAPI.
22720 [1] DEBUG Microsoft.AspNetCore.DataProtection.TypeForwardingActivator (null) - Forwarded activator type request from Microsoft.AspNetCore.DataProtection.AuthenticatedEncryption.ConfigurationModel.AuthenticatedEncryptorDescriptorDeserializer, Microsoft.AspNetCore.DataProtection, Version=3.1.7.0, Culture=neutral, PublicKeyToken=adb9793829ddae60 to Microsoft.AspNetCore.DataProtection.AuthenticatedEncryption.ConfigurationModel.AuthenticatedEncryptorDescriptorDeserializer, Microsoft.AspNetCore.DataProtection, Culture=neutral, PublicKeyToken=adb9793829ddae60
22728 [1] DEBUG Microsoft.AspNetCore.DataProtection.AuthenticatedEncryption.CngCbcAuthenticatedEncryptorFactory (null) - Opening CNG algorithm 'AES' from provider '(null)' with chaining mode CBC.
22742 [1] DEBUG Microsoft.AspNetCore.DataProtection.AuthenticatedEncryption.CngCbcAuthenticatedEncryptorFactory (null) - Opening CNG algorithm 'SHA256' from provider '(null)' with HMAC.
22751 [1] DEBUG Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingProvider (null) - Using key {3e574b2f-9f85-42d5-8f7e-c8146cbf85c9} as the default key.
22752 [1] DEBUG Microsoft.AspNetCore.DataProtection.Internal.DataProtectionHostedService (null) - Key ring with default key {3e574b2f-9f85-42d5-8f7e-c8146cbf85c9} was loaded during application startup.
22758 [1] DEBUG Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServer (null) - Failed to locate the development https certificate at '(null)'.
22786 [1] DEBUG Microsoft.AspNetCore.Hosting.Diagnostics (null) - Hosting started
22787 [1] DEBUG Microsoft.AspNetCore.Hosting.Diagnostics (null) - Loaded hosting startup assembly MUnique.OpenMU.AdminPanel

   at MultiRPC.App.Main()

Exception from accessing webpage:

49486 [4] ERROR Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultExecutor (null) - The view 'Index' was not found. Searched locations: /Views/Home/Index.cshtml, /Views/Shared/Index.cshtml, /Pages/Shared/Index.cshtml
49498 [4] INFO Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker (null) - Executed action MUnique.OpenMU.AdminPanel.Controllers.HomeController.Index (MUnique.OpenMU.AdminPanel) in 20.7192ms
49498 [4] INFO Microsoft.AspNetCore.Routing.EndpointMiddleware (null) - Executed endpoint 'MUnique.OpenMU.AdminPanel.Controllers.HomeController.Index (MUnique.OpenMU.AdminPanel)'
49499 [4] ERROR Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware (null) - An unhandled exception has occurred while executing the request.
System.InvalidOperationException: The view 'Index' was not found. The following locations were searched:
/Views/Home/Index.cshtml
/Views/Shared/Index.cshtml
/Pages/Shared/Index.cshtml
   at Microsoft.AspNetCore.Mvc.ViewEngines.ViewEngineResult.EnsureSuccessful(IEnumerable`1 originalLocations)
   at Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultEx
ecutor.ExecuteAsync(ActionContext context, ViewResult result)
   at Microsoft.AspNetCore.Mvc.ViewResult.ExecuteResultAsync(ActionContext context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResultFilterAsync>g__Awaited|29_0[TFilter,TFilterAsync](ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext[TFilter,TFilterAsync](State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeResultFilters()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)
   at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
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Tagging subscribers to this area: @agocke
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[agocke]

Should be fixed by #42352

[agocke]

Fixed in #42352

[jiangzeng01]

@agocke This is a .NetCore 3.x issue, the target is default 3.x, but we publish with .NET 5 RC2.
Will the issue be fixed by #42352?
We verified with both RC2 build: 5.0.100-rc.2.20480.7 and RTM build:5.0.100-rtm.20508.1, the issue is still happening with the same error log.

[jiangzeng01]

@agocke We verified the app with RTM build:5.0.100-rtm.20508.12, the issue is still happening even if we publish singlefile with -p:IncludeAllContentForSelfExtract=true.

As #42665 has been fixed, after retarget 5.0, the app is also failing with the same error with target 3.1. So this bug is for both .NetCore 3.1 & .Net 5 RTM.