Topic: Can't open vault using Knox 1.5.3

I can’t say for certain what actually happened, but from the logs it appeared that some NIB files could not be read from. Did this go away by itself, without touching the Knox application?

Topic: Can't open vault using Knox 1.5.3

The vault being not highlighted in the menu might mean we’ve gotten stuck trying to open the vault.
Could you open /Applications/Utilities/Console.app, press the “Show Log List” button, and in the list, select “All Messages”. Now you can filter messages in the upper right corner. Try and see if “Knox” or “diskimages” gives any results. If anything interesting comes up, could you email me the results to our support email address listed in https://www.knoxformac.com/support/#bugs, under “Bugs and Feedback”.

Just to be certain, is your copy of Knox the latest 1.5.3 version?