Error "Enter a valid value" When Saving Organization-Wide Address in Process Automation Settings

This error occurs when the Purpose of the Organization-Wide Address you are trying to use is set to Default No-Reply Address. To use the address in Process Automation Settings, you must change the Purpose to User Selection and Default No-Reply Address. 

Resolution

Change the settings using the following steps: 

1. From Setup, enter "Organization-Wide Addresses" in the Quick Find box, then select Organization-Wide Addresses.
2. Click Edit next to the target email address.
3. Change the Purpose to User Selection and Default No-Reply Address.
4. Click Save. 

(Note) Organization-Wide Addresses with the Purpose set to Default No-Reply Address also do not appear in the Email Approval Sender dropdown list in Process Automation Settings.