I believe I have the same issue.
The only spoiler here is the name of a place and an extremely vague comment, nothing more.
A little while after reaching Starcity, I lose the ability to meditate. I was a level 28 when I realized this, and I thought it had to do with Starcity itself.
I leveled up to 29, and eventually 30, not being able to meditate after either milestone, nor could I enable my perk talents like Tempest or Fire Arrow. After going through some plot points, I returned to Sun Temple, and I still could not meditate. When I press the Talent button, the compass bar flashes a few times as if to say I'm waiting for a cool-down or something, but even after 24 hours, still no luck.
Is it written into the game to restrict the player from talents once you've visited Starcity? I've already replayed over two hours of the game (leveling up from 28 through 30 again), and the "bug" begins right after the old guy yells down to us about a security system. I don't feel like I can finish the campaign until I get this working.