Plugins don't recognise license

Try Jeremy_NI's : Kontakt libraries go missing in Kontakt and Native Access.

If the above doesn't help then try Jeremy_NI's latest 'invention' : the replacing of the XML file.

download this zip file, unzip it and and replace your xml file with this one. : NativeAccess.xml.zip

Windows: C:\Program Files\Common Files\Native Instruments\Service Center

Mac: Macintosh HD > Library > Application Support > Native Instruments > Service Center

Otherwise if problem persists then please contact N.I. Native Access and Installation Support

At the page N.I. Native Access and Installation Support be sure to scroll down to page bottom to see if there is a log-in request , if there is then log-in , at next page again scroll down and small blue chat box ought occur within 15 seconds. Then write in chat box and when getting suggestions then select did not help when it didn't , that ought to bring you on to either chat with human or open a ticket. (You need to use a browser with Cookie , Security and Extensions settings that will allow for log-in on the page for the page to work)

There has been introduced chat support for Native Access assistance (at least daytime on normal work days) :

Please refer to the page : How to get in touch with our Customer Care