[HELP] Error loading CSS file. GENIUS ON ME!

I need your help guys, i am trying up a new data source “pandora” exactly.
but when im add the data source " to config":

Error: Error loading CSS file. Instantiating http://x.x.x.x:3000/public/plugins/pandorafms-datasource/css/query-editor.css!http://x.x.x.x:3000/public/vendor/plugin-css/css.js Loading http://x.x.x.x:3000/public/plugins/pandorafms-datasource/query_ctrl.js Loading plugins/pandorafms-datasource/module

How can i fix??
thanks for fall