Not found error when using Blazor

[vsfeedback]

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

---

[severity:It's more difficult to complete my work]
When creating a server side page in a Blazor Web App using .net 10 preview, after few seconds the page to Not found error page.

---

Original Comments

Feedback Bot on 8/21/2025, 05:05 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.

[MihuBot]

I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):

• New Blazor Web Application, navigate to the server project's component auto display "Not Found". #58480

[dotnet-policy-service]

Hi @@vsfeedback. We have added the "Needs: Author Feedback" label to this issue, which indicates that we have an open question for you before we can take further action. This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[dotnet-policy-service]

This issue has been automatically marked as stale because it has been marked as requiring author feedback but has not had any activity for 4 days. It will be closed if no further activity occurs within 3 days of this comment. If it is closed, feel free to comment when you are able to provide the additional information and we will re-investigate.

See our Issue Management Policies for more information.