How to add a new email device in notification preferences > delivery channel after Yokohama upgradeIssue User is unable to add a new email device in notification preferences > delivery channel after Yokohama upgradeSymptomsWhile trying add a new email device with the steps below for example, 1. Login to the instance2. Impersonalise as Abel Tatler [ for example ]3. Go to /now/platform-notifications/platform-notifications4. Go to Delivery channels5. Click on Add email 6. Fill the form and click on save7. Try to save the form an error is displayed "Error: Please fill all the mandatory fields with valid values"Expected:The form should be saved with the details provided.ReleaseYokohomaCauseStandardized forms across custom notification preferences and delivery channels is available from Yokohama onwards, to use standardized forms set the property glide.notification.preference.sn_form_enabled to true.This notification was not set in the respective instance after Yokohama upgrade.ResolutionSet the property glide.notification.preference.sn_form_enabled to true to successfully add the email device in deliver channel.Related Linkshttps://www.servicenow.com/docs/bundle/yokohama-platform-administration/page/administer/notification/task/set-notification-preferences.html