Authorization failed, "Invalid JWT Signature."

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Rodrigo Munoz

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Nov 28, 2016, 5:30:17 AM11/28/16
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Hi
We have been using the Adwords API from the last two years using OAUTH2_SERVICE_ACCOUNT, and .p12 file to authenticate.

But since last Friday we are getting this error, and we were not able to make it work again.

Signet::AuthorizationError: Authorization failed.  Server message:
{
  "error" : "invalid_grant",
  "error_description" : "Invalid JWT Signature."
}

Has anyone had this problem ???

Vishal Vinayak (Adwords API Team)

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Nov 28, 2016, 1:29:49 PM11/28/16
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Hi Rodrigo,

invalid_grant error is usually observed if your refresh token has expired. I would recommend regenerating your refresh token using the instructions avaliable for your client library here.

Regards,
Vishal, AdWords API Team
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