A Google ad server went down Wednesday morning, leaving many websites without advertising. Sites like Computerworld and CNBC.com were affected.

The ad server, known as DoubleClick for Publishers, is an advertisement software-as-a-service application.

“DoubleClick for Publishers experienced an outage this morning impacting publishers globally, across their video, display, native and mobile formats,” Google said in an email to Comuterworld. “Our team has worked quickly to fix the software bug and [DoubleClick for Publishers] is now back up and running, so our publisher partners can return to funding their content.”

According to multiple accounts, the ad server was down for about an hour.

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