Cubase shutting down

Cubase shutting down while I am trying to open an old project or after duplicate KONTAKT Instrument chanel.
In what way it can be solved ?

Hi and welcome to the forum,

Please, make sure you have the latest update of Cubase and Kontakt installed.

If it’s still crashing, attach the crash/dmp file, please.

Mac: macOS Console utility > User Reports folder or Crash Reports in macOS 10.15 (or ~user/Library/Logs/Diagnostic Reports).
Win: Documents/Steinberg/Crash Dumps