An error occurred while saving the commentJimmyJazz#58411 commented
I'm having this issue too. I finished black, then red, then unlocked the Radkos deck, before playing with any of green, white, or blue. I've played with each of the green, white, and blue decks and still can't put orbs to start those paths.
I wonder if the bug lies in playing a two-color deck before trying some of the mono decks?
EDIT: The workaround did work for me - logged out, logged back in, all paths became available. There's definitely a bug, though.