COA Display Url - Optional in UI and Required in api request

[saravolpo]

Call Only Ad setting in UI - display url field is optional

and if empty in request - we get an error from engine: A required field was not specified or is an empty string., at mutate_operations[0].ad_group_ad_operation.create.ad.display_url

[nwbirnie]

Hey, this is an issue with the backend API, rather than the Java client library. Could you post this on the forum please?