"Nullable object must have a value" error while Publishing Dashboard is empty

  • The Publishing Dashboard might fail to display active, queued, and recent publishing jobs. The following errors can be found in the logs:
    Exception System.InvalidOperationException: Nullable object must have a value.
    at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
    at Sitecore.Publishing.Service.RemoteProxies.ManifestStepMessageExtensions.ToManifestStatus(ManifestStatusMessage message)
    at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext()
    at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
  • To resolve the issue, download and install the hotfix compatible with the affected product version:

    Be aware that the hotfix was built for a specific Sitecore Publishing Service Module version, and must not be installed on other Sitecore Publishing Service Module versions or in combination with other hotfixes. In case any other hotfixes have already been installed on a certain Sitecore XP instance, send a request for a compatibility check to Sitecore Support.

    Note that the ZIP file contents need to be extracted to locate installation instructions and related files inside. The hotfixes must be installed on a CM instance and then synced with other instances using standard development practices.

Applies to:

Publishing Service Module 9.1.1 - 9.3.0

Publishing Service Module 10.0.0

February 01, 2021
February 01, 2021

Reference number:



  • Publishing