How far are you into valeria's story there was a bug in the game that if you went to far into Val's story it would lock you out of Nox's story.
Here is the path were he said he fixed this
v0.7.1
No new content this time, but this update finally fixes a major issue where Val’s story progression could interfere with Nox’s.
If you advanced too far in Val’s storyline, you might’ve been locked out of Nox’s events — this patch should now fully resolve that problem.
I have also looked on his Patreon and found this
This was 3 weeks ago and a patreon said =
Nox's storyline is still locked for me and i even restarted the game and focused on Nox's story first
If you go to the Patreon page he has his email address on there send him a bug report. Just look for the patch fix v0.7.1 you will see the email address on that post.