Playing a coop void crusade, no matter how many info-fragments your find and missions you play, secret missions won't unlock. Supreme Mission is locked behind secret missions, leading to the inability to complete the void crusade.

Also Lives are counted incorrectly. We died twice during the void crusade within a mission, but lives are now displayed as -1 starting from 8, 6 would be correct. It could be a display-error only, as the void crusade is still continuing.

Is it possible to fix this somehow to finish the crusade or should I abandon and restart?

This is the third void crusade I played that I was unable to complete due to a bug, this is slightly frustrating I have to say.

See picture below: