Internal error : Ad Group isn't currently available to serve.
I have been experiencing a problem with Display network Ad Group's internal error saying "This ad group isn't currently available for serving. Please try again later." I have increased my bid and increased the reach to 2 Million impressions per week and my ads are approved as well.
Still, my ads are unable to serve. I have been trying to reach Ad Words support for assistance but they are unavailable too.
Please need support ASAP.