The vendor has published 1 unique mention(s) for this bug: 1. When you select a user from Citrix Group Policy Modelling Wizard and choose the Skip to the final page of the wizard without collecting additional data option, this error message might appear on the Summary page: Value cannot be null. Parameter name key Latest urls for this bug: 1. https://docs.citrix.com/us/en/citrix-virtual-apps-desktops/2203-ltsr/whats-new/cumulative-update-4/fixed-issues.html