Error: Could not authenticate user. Invalid Domain, Username, API Key or the user does not have the correct User Role set.
- This is caused by an incorrect setting in the Magento API Key. To fix this, log into Magento and select System->Configuration
- Once in the Configuration screen, scroll down and click on Magento Core API
- Under General Settings, select WS-I Compliance to No
- Go back into OneSaas and synchronise the Magento connection.