Boost recurring donations this giving season with the new upsell prompt!This error appears to arise as the result of some confusion regarding the Salesforce login credentials your Soapbox account is using to log into Salesforce. To resolve this error message, reset your the password of that account, and enter the new password and security token in the Salesforce.com Settings of your Soapbox account.
More information on resetting your Salesforce credentials can be found here: Adding or updating your Salesforce credentials in Soapbox