New iMovie events empty after import from last version

Hey!

I just launched to new iMovie and started to import projects and events from the last version. It did OK until it freezed and I had to force quit it. Now when I launch i can see the events there but all of them are emtpy. The library file itself is 405 gigs tho and includes the footage. Any idea how can i get it fixed to show footage in the events?

thanks