jquery-us.css Error

Developer Tools –> Sources I get this in Red in 2 places.

Failed to load resource: the server responded with a status of 404 (Not Found)
https://intranet/wp-content/plugins/wp-support-plus-responsive-ticket-system/asset/css/jquery-ui.css?version=8.0.4&ver=4.7.3

Any help on this? I don’t have jquer-ui.css in that folder only
jquery-ui.min.css
jquery-ui.structure.min.css
jquery-ui.theme.min.css

Am I supposed to also the jquer-ui.css in here?

When I disable the plugin, I dont get the error.