Thank you for answering!
I can convert to Unformatted Citations. When I select all and then ctrl+6 it says:
“This document does not contain any editable citations. Citations must be formatted to use the Edit Citations tool.”
When I tried to update citations and bibliography it gave me some citations that I had to choose the right source to, and when I finished this word shut down again.
So I tried to remove the sources it couldn`t find, but it didnt help. When I try to update citations and bibliography now it shuts down immediately.