Starting April 28, 2025, Google Ads API version v19.1 will return a new error code, DEVELOPER_TOKEN_INVALID, when a request includes an invalid developer token making it clearer than the previous generic OAUTH_TOKEN_HEADER_INVALID error.
Older versions (before v19) will continue to return DEVELOPER_TOKEN_NOT_APPROVED for this case. Developers using v19 must update their client libraries after the v19.1 release.
This change mainly benefits new developers and won’t impact existing, correctly configured integrations.
