Serilog UI shows nothing

[TPo2025]

Describe the bug
If the BasePath is changed, Serilog does not output a UI. The screen remains blank. There is no error in the console and the Browsers source code looks normal.

To Reproduce
Steps to reproduce the behavior:

1. Change Base / HostingPath in your C# Projekt or on your Server

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
Ok

Not Ok

Minimal Sourcecode Example

Desktop (please complete the following information):

• OS: IIS / IISExpress
• Browser Edge, Chrome
• .Net 9

[followynne]

Hello @TPo2025

I don't see in the sample the usage of the method exposed by the library to define the serilog-ui route prefix.

Can you follow the documentation as seen here and let me know?

If you need a sample, you can read the samples/ folder in the repository.

[TPo2025]

Hi @followynne,

Thank you for your feedback.

I have already tried to use the Route Prefix API. However, I was only able to adapt the URL accordingly. For the sake of simplicity, I have omitted this in my example.

As an example:

However, this does not change the fact that the page remains empty.

I don't think that the path itself is the problem, as the source code is loaded.

(The Errors are from Visual Studio Websocket)

What am I doing wrong?

[TPo2025]

[followynne]

@TPo2025

Can you try setting the route prefix to the complete path you hope to set, example: "log/your/path?"

From the screenshot you shared, I'd see you need to set the complete prefix and make it start with log/...

[TPo2025]

@followynne

I would like to explain the problem once again:

The Route Prefix sets BasePath + RoutePrefix

My base path is http://localhost:16604/log
I set this base path in my development environment, as the application only runs under this path on the server (www.example.com/log). I have no access rights to the root path (www.example.com).

Now when I set the RoutePrefix to

Then I can access the application at the URL

I have adjusted the behavior in the launch settings in the development environment just like on the server. This is the only way I can reproduce the error:

launchsettings.json

When i change the path so simply localhost there is no Problem an Serilog-UI Works fine.

[followynne]

@TPo2025

thanks for the additional info, your issue is getting more clear now. I will try to replicate your issue and let you know.

[TPo2025]

@followynne
Thank you very much for fixing this issue!

[followynne]

@TPo2025
You're welcome! 😊

I'll release a patch as soon as I close another PR undergoing, afterwards I'll notify you to get a feedback!