.NET 10 Blazor App crashes while it works fine in .NET 9

[vsfeedback]

This issue has been moved from a ticket on Developer Community.

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My application adds a Scoped Service which causes the Blazor App to crash with the following error:

System.AggregateException: 'Some services are not able to be constructed
(Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Server.Kestrel.Core.Internal.PinnedBlockMemoryPoolFactory
Lifetime: Singleton ImplementationType: Microsoft.AspNetCore.Server.Kestrel.Core.Internal.PinnedBlockMemoryPoolFactory':
Cannot consume scoped service 'System.TimeProvider' from singleton 'Microsoft.AspNetCore.Server.Kestrel.Core.Internal.PinnedBlockMemoryPoolFactory'.)'

I have attached a solution that illustrates the crash.

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Original Comments

Feedback Bot on 11/19/2025, 06:27 AM:

We have directed your feedback to the appropriate engineering team for further evaluation. The team will review the feedback and notify you about the next steps.

[javiercn]

Thanks for contacting us.

Could you provide a minimal repro project as a public github repository that demonstrates the issue?

From the call stack of the error this doesn't seem Blazor related.