I had the exact same problem the other day! Tried clearing the cache on my Xbox One which didn’t work, ended up reinstalling it which fixed it (so I thought). Was working for a few days since no problems but was playing earlier today then stopped to have some lunch and ever since I’ve not been able to get on again. I have tried clearing the cache and reinstalling twice now, still coming up with nightingale. Bungie obviously doesn’t care as this issue has been ongoing for at least 2 years. I know this because while looking online for a solution, I found a reddit post from 2 years ago of someone saying the exact same situation as me where they stopped for food and couldn’t play again afterwards. I played D1 a lot but only hopped on D2 when BL dropped, played a lot the first couple weeks with the standard error codes occasionally that let you straight back into activities but only this week the nightingale ones. No idea what to do now reinstalling clearly isn’t working.