We got some 3rd party reports that Authorize.net may be rolling back their changes tonight due to its effect. You may have to roll back the previously listed fix.
Posted Jan 22, 2019 - 23:56 EST
Monitoring
We received many tickets about Authorize.net issues today. Please know this is not a hosting issue.
Customers should contact their developer for further assistance if this change is affecting you. We have not gotten reports of this affecting Magento 2 stores.
Posted Jan 22, 2019 - 18:53 EST
This incident affected: Webscale STRATUS - Northern Virginia, Webscale STRATUS - Frankfurt, and Webscale STRATUS - Sydney.