runtime: With Blazor WebAssembly, XML validation errors are not reported correctly ONLY when deployed

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

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[severity:I’m unable to use this version] The following code works fine on localhost, but produces limited error messages when deployed to an Azure Static Web App through GitHub.

    string ValidationResult="All good";
    protected override async Task OnInitializedAsync()
    {
        string path = "sample-data/Books.xml";
        byte[] byteArrayS = await _client. GetByteArrayAsync(path);
        Console.WriteLine($"{path}: {byteArrayS.Length}");
        MemoryStream streamS = new MemoryStream(byteArrayS);
        XmlReader xmlReader = XmlReader.Create(streamS);

XmlDocument document = new XmlDocument();
        //document. Validate();
        try
        {
            document. Load(xmlReader);
        }
        catch (Exception e)
        {

Console.WriteLine($"Validation Error: {e.Message} on line ");
            ValidationResult = e.Message;
        }
    }

When loading the badly formed XML file books.html (attached), the line document. Load(xmlReader); fires an error. The problem is that while on localhost this error has a meaningful message, such as:

'<' is an unexpected token. The expected token is '>'. Line 6, position 5.

The deployed version produces a meaningless error message:

Xml_MessageWithErrorPosition, Xml_UnexpectedTokenEx, 6, 5

Am I doing something wrong? Is this a bug?

I have created a public repo at https://github.com/GilShalit/XMLValidation

[Books.xml] (https://aka.ms/dc/file?name=B46c6ab30f4824fb888ce490ae7655355637503790903832654_Books.xml&tid=46c6ab30f4824fb888ce490ae7655355637503790903832654)

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Original Comments

Feedback Bot on 3/3/2021, 11:00 PM:

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.

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Original Solutions

(no solutions)