Hello, @Boris!
Most likely, our Support Team has to establish a remote session to resolve your issue. Please send a support bundle so that you could get personalized help from our specialists. Here you can check how to generate a support bundle https://helpcenter.nakivo.com/display/NH/Support+Bundles#SupportBundles-CreatingSupportBundles
If you have any doubts, don't hesitate to contact me!