OES 2018 - iManager close browser tab

I´m currently in process of testing OES2018 and found weird behavior with iManager, when I click on some links in left pane it will close the browser tab, some links working like Directory Administration > Copy object and some time outing with Error 500.

When I try open NCS I get this in iManager log :

GadgetManager......2829 No Resource File Map found for StylesheetSet: com.novell.nps.gadgetManager.LaunchService

NCS plugin was installed couple minutes ago ...
System is fully patched. Tried FireFox and Chrome.