Unable to start the service

Hi, This error appear while starting the service. How can I resolve it?

"Topshelf v4.3.0.0, .NET Framework 4.8.4420.0 (4.0.30319.42000) Topshelf.Hosts.StartHost Error: 0 : The service failed to start., System.ServiceProcess.TimeoutException: Time out has expired and the operation has not been completed. at System.ServiceProcess.ServiceController.WaitForStatus(ServiceControllerStatus desiredStatus, TimeSpan timeout) at Topshelf.Runtime.Windows.WindowsHostEnvironment.StartService(String serviceName, TimeSpan startTimeOut) at Topshelf.Hosts.StartHost.Run()"

Thank you for your app!