I'm trying to do the Duviri quest and I have reached the point where I'm controlling the Orowyrm. It's telling me to press UNBOUND to dive and will not progress the quest until I do.
What do I need to bind for this? I've reset all my controls to default, assigned keys to everything that wasn't bound, and even restarted the quest.
Here's a screenshot to show what I mean: https://imgur.com/a/crXleYT