changes affecting Magento 1 stores
Incident Report for MageMojo
We got some 3rd party reports that may be rolling back their changes tonight due to its effect. You may have to roll back the previously listed fix.
Posted 27 days ago. Jan 22, 2019 - 23:56 EST
We received many tickets about issues today. Please know this is not a hosting issue. has pushed changes that can break your checkout process, see this link for info about a fix for Magento 1-

This is also mentioned via at

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 27 days ago. Jan 22, 2019 - 18:53 EST
This incident affected: USA - PITT1 - Services (MHM) and Mojo Stratus - Northern Virginia, Mojo Stratus - London, Mojo Stratus - Frankfurt, Mojo Stratus - Sydney.