I've dotnet core 3.1 project. I launched a few machines on iis. But today i can't launched the app on iis. I can launch with "dotnet <app.dll>" command and everything's good. But when i launch on IIS, it gives this error.

"crit: Microsoft.AspNetCore.Server.Kestrel[0]
Unable to start Kestrel.
System.Net.Sockets.SocketException (10013): An attempt was made to access a socket in a way forbidden by its access permissions.
at System.Net.Sockets.Socket.UpdateStatusAfterSocketErrorAndThrowException(SocketError error, String callerName)"

Any suggestion ?

PS: I checked my ports in use with command netstat -o. There is no using from any application