INFO : 2021-06-05 01:59:15Z - Acquiring server...
INFO : 2021-06-05 01:59:15Z - Server 'winbuildsv1' acquired.
INFO : 2021-06-05 01:59:15Z - Deploying Bootstrapper artifact to working directory...
INFO : 2021-06-05 01:59:15Z - Artifact deployed.
ERROR: 2021-06-05 01:59:16Z - Unhandled exception: System.NullReferenceException: Object reference not set to an instance of an object.
   at Inedo.Extensions.AWS.Operations.UploadFilesToS3Operation.CreateClient(AwsSecureCredentials credentials)
   at Inedo.Extensions.AWS.Operations.UploadFilesToS3Operation.<ExecuteAsync>d__60.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Inedo.BuildMaster.Windows.ServiceApplication.Executions.PlanExecuter.OtterScriptExecuter.<ExecuteActionAsync>d__50.MoveNext()