Orchestrator Web Page Does Not Open After Upgrading To 20.4

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After upgrading from 19.10 to 20.4, Orchestrator web page cannot be opened. "page not found" is shown. When opening https://orchestrator_url/identity, the following error is shown.

“Could not load file or assembly ‘NWebSec, Version=4.3.0.0, Culture=Newtral, xxx’ or one of its dependencies. The system cannot find the file specified.”

Issue Description: After upgrading from 19.10 to 20.4, Orchestrator web page cannot be opened. “page not found” is shown. When opening https://orchestrator_url/identity, the following error is shown.

“Could not load file or assembly ‘NWebSec, Version=4.3.0.0, Culture=Newtral, xxx’ or one of its dependencies. The system cannot find the file specified.”


Root Cause: Two Application pools are missing,

  • Identity
  • WebHooks.

Resolution :Create Identity and WebHooks application pool manually with No Managed Code as .Net CLR Version. Assigned the same user as Orchestrator Application pool.
  1. Open IIS manager.
  2. Select Application Pools
  3. Right click and select 'Add Application Pool'
  4. Set the following configuration.
  • Name: Identity
  • .Net CLR Version: No Managed Code
  1. Leave others as default settings
  2. Right click the created application pool and click 'Advanced Settings'
  3. Choose Identity and configure it to be a user account, if needed.
  4. Repeat steps 3 - 6 and create WebHooks, too.
  5. Restart the IIS.