The “chan_status_flags” indicate that this channel is poof.
You’d need to dig into your logfiles to answer your next question on what happened. But since it’s 2 months ago, I’m quite certain your logfiles already rotated and the info is gone.
So now how to get the funds back, I’m afraid a force-close is the only way as far as I can see. If you happen to use GUIs like RTL or Thunderhub, they offer the option to force-close.
Or check this guide if you prefer the command line.