Visual studio 2022 aspnetcore 6 web api template https stop working

Question

am trying to run a web api application created with Visual Studio 2022 on my windows 10 laptop and keep receiving this ERR_SSL_VERSION_OR_CIPHER_MISMATCH, both on Chrome and Edge. The startup code for the application:

var builder = WebApplication.CreateBuilder(args);  
  
// Add services to the container.  
  
builder.Services.AddControllers();  
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle  
builder.Services.AddEndpointsApiExplorer();  
builder.Services.AddSwaggerGen();  
  
var app = builder.Build();  
  
// Configure the HTTP request pipeline.  
if (app.Environment.IsDevelopment())  
{  
    app.UseSwagger();  
    app.UseSwaggerUI();  
}  
  
app.UseHttpsRedirection();  
  
app.UseAuthentication();  
app.UseAuthorization();  
  
app.MapControllers();  
  
app.Run();  

Answer 1

Hi

This error occurs mainly because of a problem with the SSL certificate or encryption modules. We can take some server-side actions to resolve this issue.
For your reference
https://phoenixnap.com/kb/fix-err-ssl-version-or-cipher-mismatch

Answer 2

Hi

Try adding

<PropertyGroup>  
  <UseAppHost>false</UseAppHost>  
</PropertyGroup>  

You can check below links for troubleshooting.
https://github.com/dotnet/aspnetcore/issues/18236
https://wpdatatables.com/err_ssl_version_or_cipher_mismatch/

Answer 3

Hi

Try adding

<PropertyGroup>  
  <UseAppHost>false</UseAppHost>  
</PropertyGroup>  

https://github.com/dotnet/aspnetcore/issues/18236