Failed to fetch while error reading CSV file ASP.NET - csv

Question

I'm trying to read .CSV file and instead of the read lines, Swagger outputs
Failed to fetch.
Possible Reasons:
CORS
Network Failure
URL scheme must be "http" or "https" for CORS request.
In my opinion, even Visual Studio crashed, the application immediately stops working
//Controller
[ApiController]
[Route("[controller]")]
public class HomeController: ControllerBase
{
private readonly ICSVService _csvService;
public HomeController(ICSVService csvService)
{
_csvService = csvService;
}
[HttpPost("read-csv")]
public async Task<IActionResult> GetCSV([FromForm] IFormFileCollection file)
{
var dataFromFile = _csvService.ReadCSV<Values>(file[0].OpenReadStream());
return Ok(dataFromFile);
}
}
// Reader
public class CSVServise : ICSVService
{
public IEnumerable<T> ReadCSV<T>(Stream file)
{
var reader = new StreamReader(file);
var csv = new CsvReader(reader, CultureInfo.InvariantCulture);
var records = csv.GetRecords<T>();
return records;
}
}
// Program.cs
builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms /aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
builder.Services.AddScoped<ICSVService, CSVServise>();
builder.Services.AddCors();
var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseCors(builder => builder.AllowAnyOrigin());
app.UseHttpsRedirection();
app.UseAuthorization();
app.MapControllers();
app.Run();
My launchSettings.json
I thought enabling CORS would help, but it doesn't seem to have worked. And now I have no idea - what could be the problem?