As a site administrator logged in to the backend, I see a large set of error messages on login "Error describing Salesforce table. Please try again."
This error message means that Soapbox isn't able to talk to Salesforce's API, which most likely is due to a problem with the login credentials set in the System - J!Salesforce Libraries Plugin such as a Salesforce password or security token that was reset but not updated.
Login to your Soapbox administrator and go to Extensions > Plugin Manager. Search for the plugin called "System - J!Salesforce Libraries" and open it to edit. Update the username, password and token fields accordingly. The error message should disappear as soon as the credentials are correctly updated.