After clearing the Rebels from the mine and capturing Aire, then telling Duncan I wanted to 'get right into it', I went to speak to Myr. The second dialog option with her was LOOKING_FOR_PRINCESS_OPTION_19_1 in yellow. None of the dialog options worked though, effectively locking the game up because:
SCRIPT ERROR: Invalid get index 'looking_for_princess_mages_pre_bracelet' (on base: 'Dictionary').
at: start_event (res://src/core/input_handler.gd:968)
This is maybe an improvement from previous .9 versions where the quest was broken at this point but I couldn't see any errors in the console.
Cheers.