Splunk App for Windows Infrastructure: After upgrading to Splunk 6.3.3, why am I getting "Your indexes and inputs configurations are not internally consistent"?

Hi, After upgrading to Splunk 6.3.3, the following problem is displayed when starting Splunk: Checking conf files for problems... Invalid key in stanza [ui] in /opt/splunk/etc/apps/splunk_app_windows_infrastructure/default/app.conf, line 15: attribution_link (value: app.attributions). Your indexes and inputs configurations are not internally consistent. For more information, run 'splunk btool check --debug' Does anybody know how to solve the problem? Thanks!