Kontakt doesn't sound on Logic...

Hi, I'm using kontakt 6.8.0, logic 10.5.1, and os is Mojave 10.14.6.

When I call the kontakt in Logic, all the instruments are called normally, and I get the signal that the kontakt is making sound, but the logic doesn't make any sound at all.

Hope somebody help my issue, I haven't worked with the Kontakt for a long time :(

and Do you know how I can catch the personal support of NI. I couldn't fine it out.

sincerely