On 30 November 2020 V201911 of the Ad Manager API Will Sunset
https://ads-developers.googleblog.comOn Monday, November 30, 2020, in accordance with the deprecation schedule, v201911 of the Ad Manager API will sunset. At that time, any requests made to this version will return errors.
If you’re still using v201911, now is the time to upgrade to a newer release and take advantage of additional functionality.
