Hm I think you should be able to castle there. I just had a play around on the analysis board and it would not allow me to castle either in this position or earlier in the game for either side...i would file a bug report.
Unable to castle in 960

I believe by the rules of castling in Chess 960 I should be able to castle Queenside, leaving my King on c1 and my rook on d1. This doesn't move my King into, through, or out of check, and the spaces are clear. Neither the King nor rook has moved this game. When trying to complete this move on my phone it shows it on my screen, but upon clicking the confirm button I get a "Game update failed" error. The online interface won't even let me make the move; dragging my King onto my rook does nothing.
Thanks for any help or insight, I hope I'm not missing something obvious.
This has been bug reported and being worked on:
https://www.chess.com/forum/view/help-support/problem-castling-in-chess960-from-browsers
I believe by the rules of castling in Chess 960 I should be able to castle Queenside, leaving my King on c1 and my rook on d1. This doesn't move my King into, through, or out of check, and the spaces are clear. Neither the King nor rook has moved this game. When trying to complete this move on my phone it shows it on my screen, but upon clicking the confirm button I get a "Game update failed" error. The online interface won't even let me make the move; dragging my King onto my rook does nothing.
Thanks for any help or insight, I hope I'm not missing something obvious.