SYMPTOM:
When attempting to connect to a Salesforce data source from Data Import in Strategy Web 9.4.1, users must first log into Salesforce, so Strategy Web takes them to the Salesforce login screen. After login in, the users are directed back to the Strategy Web Data Import interface but were not allowed to proceed further. In the URL bar, the following error can be seen:

error=1804&error_description=the+requested+scope+is+not+allowed