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.
If the module Goodworks_ApiExtensions is installed and enabled this might be due to an incorrect caching of the WSDL. Disabling WSDL Caching may resolve that issue until the reason for issue can be diagnosed and resolved by your developer. The setting for WSDL Caching is located in Magento by navigating to System > Configuration > Magento Core API > General Settings.
This error may also indicate that Goodworks_ApiExtensions is not installed, or an old version is installed. If disabling WSDL caching does not resolve this issue please review for any possible changes to the Magento server, and contact our support team for the specific error text received from Magento.
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.