Problem:

After creating a new list item in the workspace list to create a new site the process runs in error occured. You get this error message in the uls log:

Solutions2Share.Solutions.CollaborationManager.EventReceivers.GroupPermissionChoiceFieldEventReceiver.ItemUpdating: Field type CM_PictureField is not installed properly. Go to the list settings page to delete this field.    ExceptionType: 'SPException'   ExceptionMessage: 'Field type CM_PictureField is not installed properly. Go to the list settings page to delete this field. '   StackTrace: ' 

at Microsoft.SharePoint.SPFieldCollection.CreateSPFieldFromSafeArray(Int32 index)     

at Microsoft.SharePoint.SPFieldCollection.EnsureSPField(Int32 index)     

at Microsoft.SharePoint.SPFieldCollection.ItemAtIndex(Int32 iIndex)     

at Microsoft.SharePoint.SPContentType.get_Fields()     

at Solutions2Share.Solutions.CollaborationManager.EventReceivers.GroupPermissionChoiceFieldEventReceiver.ItemUpdating(SPItemEventProperties properties)'   Source: 'Microsoft.SharePoint'   TargetSite: 'Microsoft.SharePoint.SPField CreateSPFieldFromSafeArray(Int32)' 

Reason:

After the installation from < 2.1 you forgot the iisreset on the web front end server.

Solution:

Perform an iisreset on all servers to register the new custom field type.