Channels is unable to access the Accumula Module on your Magento Server. This is likely due to recent changes made to your Magento Server by your team. This is blocking your integration. Please review recent changes made to your Magento settings asap.
Either the Accumula module is not installed, or an old version is installed. Please review for any possible changes to the Magento server, and contact our support team for assistance.
The Accumula module is only used to gain access to order tax information that isn't accessible via the Magento API. If you're using Taxes as a Line Item this error will not impact your integration.
Note: If you encounter this error only once it is most likely a single instance of a connectivity issue.