3189721 - DM - Upgrade fails (cundus.enterpriseReporting.Services.dll.Config.bak')

When running an upgrade (Stack 19xx) there is an error

************** Exception Text **************
System.IO.DirectoryNotFoundException: Could not find a part of the path 'C:\inetpub\wwwroot\SAP\SAP Disclosure Management\\bin\cundus.enterpriseReporting.Services.dll.Config.bak'.
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.File.InternalCopy(String sourceFileName, String destFileName, Boolean overwrite, Boolean checkHost)
   at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
   at SAP.DM.AppServerSetup.ServiceOperations.InstallationOperator.ExtractFilesFromZipArchive()
   at SAP.DM.AppServerSetup.PageInstallationProgress.<>c.<RunInstallationAsync>b__13_0()
   at System.Threading.Tasks.Task.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()

Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.

Disclosure Management 10.1

C:\inetpub\wwwroot\SAP\SAP Disclosure Management\\bin\cundus.enterpriseReporting.Services.dll.Config.bak , KBA , EPM-DSM-INS , Installation , Problem