I bought the sapphire theme .. I followed the guide to: https://www.primefaces.org/sapphire/docs.xhtml
I hope I have taken all the necessary steps ... but when I run the test webbapp, I get the errors:
com.sun.faces.application.resource.ResourceHandlerImpl.logMissingResource JSF1064: Unable to find or serve resource, theme.css, from library, primefaces-primefaces-sapphire-blue.
18-Apr-2019 12:11:39.271 GRAVE [http-nio-8080-exec-10] com.sun.faces.application.view.FaceletViewHandlingStrategy.handleRenderException Error Rendering View[/index.xhtml]
javax.faces.FacesException: Error loading css, cannot find "theme.css" resource of "primefaces-primefaces-sapphire-blue" library
at org.primefaces.renderkit.HeadRenderer.encodeCSS(HeadRenderer.java:150)
...
....
com.sun.faces.context.ExceptionHandlerImpl.log JSF1073: javax.faces.FacesException caught during processing of RENDER_RESPONSE 6 : UIComponent-ClientId=, Message=Error loading css, cannot find "theme.css" resource of "primefaces-primefaces-sapphire-blue" library
18-Apr-2019 12:11:39.322 1100 [http-nio-8080-exec-10] com.sun.faces.context.ExceptionHandlerImpl.log Error loading css, cannot find "theme.css" resource of "primefaces-primefaces-sapphire-blue" library
javax.faces.FacesException: Error loading css, cannot find "theme.css" resource of "primefaces-primefaces-sapphire-blue" library
...
etc.. etc...
this is a Netbeans screenshot where I text my webapp:

what am I doing wrong?