This incident has been resolved.

The sub-set of stores is now available. We had a database server failure and the automated tooling did not successfully failover to the other available servers. Engineers will be investigating why this tooling didn't work.

A fix has been implemented and we are monitoring the results.

The issue has been identified and a fix is being implemented.

BigCommerce engineers are investigating availability issues with a sub-set of stores. We will update shortly with our findings.