Cannot Open streams (for reading files) in Blazor Server App

I have a Blazor Server app, that's acting as a Teams App. The problem is that I can't read files uploaded through this component:

<InputFile class="form-control mb-4" OnChange="@OnInputFileChange" multiple />

These versions of OnInputFileChange:

private async Task OnInputFileChange(InputFileChangeEventArgs e){    IBrowserFile fi = e.File;    MemoryStream stream = new MemoryStream();    await fi.OpenReadStream(fi.Size).CopyToAsync(stream);}

private async Task OnInputFileChange(InputFileChangeEventArgs e){    await using FileStream fs = new(path, FileMode.Create);    await browserFile.OpenReadStream().CopyToAsync(fs);}

is just one of many iterations, but the issue is always the same:

No bytes or data can be read from the file and it always fails to read the stream and thereby fails to copy to another stream. I get the files metadata, but cannot read from it.

I have tried to increase the message size in program.cs: (The file I am uploading is 8KB)

builder.Services.AddSignalR(options =>    {        options.EnableDetailedErrors = true;        options.MaximumReceiveMessageSize = 102400000; // 100 MB    });

I have tried to make a hub and do this:

app.MapHub<FileUploadHub>("/fileUploadHub", options =>    {        options.ApplicationMaxBufferSize = 102400000; // 100 MB        options.TransportMaxBufferSize = 102400000;   // 100 MB        options.LongPolling.PollTimeout = TimeSpan.FromSeconds(30);    });

Each time I create a new stream I also get this:

ReadTimeout = 'stream.ReadTimeout' threw an exception of type 'System.InvalidOperationException'WriteTimeout = 'stream.WriteTimeout' threw an exception of type 'System.InvalidOperationException'

Be it MemoryStream or Another kind of stream. I cannot open a stream and read data.

I have done a similar thing in Blazor WebAssembly without issue, so I suspect Blazor Server App.