Why Data Reviewer Server Services fail to start after upgrade?

MMBR

I have upgrade ArcGIS Server and Data Reviewer Server (DRS) binaries. ArcGIS Server is working fine but DRS services fail to start. What is the cause?

Service failed to start

BatchValidation.reviewer.MapServer:
Could not load file or assembly 'ESRI.Reviewer.Public.Engine.Interop, Version=10.6.0.0, Culture=neutral, PublicKeyToken=49f88df635890024' or one of its dependencies. The system cannot find the file specified.

MMBR

Resolution: Reinstall DRS binaries and redeploy DRS SOE, must do this step to install the new SOE manually.

Open ArcGIS Server Manager > Site > Extensions > ESRI.ReviewerServer.soe > Action: Edit >

Extension > Select File >

"C:\Program Files\ArcGIS\ArcGISDataReviewerServer\Server10.8\Bin\ESRI.ReviewerServer.soe"

Then, test each ArcGIS Server Service, stop/start each service manually and check the ArcGIS Server Logs for severe errors.

If necessary redeploy DRS Services.

https://enterprise.arcgis.com/en/data-reviewer/latest/help/publishing-arcgis-data-reviewer-for-server-services.htm

If necessary reconfigure DRS Services using DRS Configuration Utility, see example below.

1. ArcGIS Server DRS Services > BatchValidation > reviewer
Open the DRS Configuration Utility:
Connect to ArcGIS Server:

http://localhost:6080/arcgis/admin
UserName: drsadmin
Password: ****
Add DRS extension:
Select extension file
C:\Program Files\ArcGIS\ArcGISDataReviewerServer\Server10.8\Bin\ESRI.ReviewerServer.soe
Set Reviewer Workspace:
Select Map Service - BatchValidation/reviewer.MapServer
Select New Reviewer Workspace - F:\sqlexpressgdb\localhost_RevWorkspace.sde