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ProjectMessageNotifier: Cannot access a disposed object - Object name: 'IServiceProvider'



We just upgraded our project to the latest CMS packages and we keep getting the error below each time we publish content (CMS or Catalog) via a scheduled job. Publishing seems to be working fine even with the error being thrown, but it seems to take more time now. It happens both locally and in DXP.

fail: EPiServer.Cms.Shell.UI.Rest.Projects.Notifications.Internal.ProjectMessageNotifier[0]
      System.ObjectDisposedException: Cannot access a disposed object.
      Object name: 'IServiceProvider'.
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.ThrowHelper.ThrowObjectDisposedException()
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
         at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService[T](IServiceProvider provider)
         at EPiServer.Notification.Internal.DefaultSubscriptionRepository.ClearSubscriptionAsync(Uri subscriptionKey)
         at EPiServer.Notification.Internal.DefaultSubscriptionService.ClearSubscriptionAsync(Uri subscriptionKey)
         at EPiServer.Cms.Shell.UI.Rest.Projects.Notifications.Internal.ProjectMessageNotifier.UnsubscribeFromAllActivitiesFromPublishedVersion(ContentReference contentLink)
         at EPiServer.Cms.Shell.UI.Rest.Projects.Notifications.Internal.ProjectMessageNotifier.ActivityCreated(Object sender, ActivityCreatedEventArgs e)

Packages used:

        <PackageReference Include="EPiServer.CMS" Version="12.27.0" />
        <PackageReference Include="EPiServer.CMS.Core" Version="12.20.3" />
        <PackageReference Include="EPiServer.CMS.UI" Version="12.27.0" />
        <PackageReference Include="EPiServer.CMS.UI.Core" Version="12.27.0" />

Feb 23, 2024 6:48

We are also currently upgrading to this version and have noticed this in our logs. 

Feb 28, 2024 7:50

We, too, receive this error every time a content is updated. 

Feb 29, 2024 11:56

Thank you for your feedback on this error, I have been able to reproduce it on 12.20.3 and have asked that the devs take a look at it. Currently the reported bug is not published, but once they have had a look at it you should find it at

Mar 04, 2024 18:04

That bug is now closed as duplicate but what is the duplicate bug-ticket number?

Edited, Mar 14, 2024 13:06

the bug CMS-32880 which is now fixed and will be released with CMS.Core 12.21.0 

Mar 14, 2024 14:10
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