Bug Report - Your Game Review could not load due to an error on our end

Hello Chess.com, do not know where is the right place to report bugs. Mt last two games against the computer I got the error message below when running the review. Here is the game.

https://www.chess.com/analysis/game/computer/8923749?tab=review

and if I go to this game, click info, then click analysis it says cannot analyze a game with no moves

https://www.chess.com/game/computer/8758453

Your Game Review could not load due to an error on our end. We apologize for the inconvenience.

The red thing is written by chess.com?

Yes

I'm seeing the same error with my last few Daily 960 games.  Earlier Daily 960 games are showing their analysis just fine, so it's not particular to the format (but this is not against the computer, as in chess41's case).  Will comment on here again if the issue resolves itself in the next day or two - though it's not the first time I've seen this.

As an aside, the accuracy figures are listed in my games list after the analysis has run, so that much at least is working.  I just can't play through the analysis to easily assess the game move-by-move, etc.

Good to know.  Were you able to run the analysis on those games successfully at a later time/date, as far as you recall?

That's really helpful, thank you.  Like you, I could see the percentage ratings for the games, despite not being able to use the move-by-move analysis.

However, your saying that you remained unable to analyse the games at a later date, coupled with the fact that some - but not all - of my 960 Daily games were affected, led me to think that there could be something particular to the affected games only ... and I think I've found something.

I tried copying the PGNs of both a 'working' and a 'faulty' game into the LEARN > ANALYSIS section of the website, to see if I could run an analysis independently of the one that had been saved in my game history.  Interestingly, the 'working' game analysed just fine - but the 'faulty' game did not.  So this is a completely separate analysis, but the same game kicks up the error.

The only data that I didn't understand from the PGN was towards the end of the FEN line.  The 'working' game looked like this:

• [FEN "qrbkrnnb/pppppppp/8/8/8/8/PPPPPPPP/QRBKRNNB w EBeb - 0 1"]

(note the 'EBeb' - whatever that means)

... and the 'faulty' game looked like this:

• [FEN "bqrnkbrn/pppppppp/8/8/8/8/PPPPPPPP/BQRNKBRN w GCgc - 0 1"]

The 'working' game was also won by resignation, while the faulty game was won on time.  No idea if that's relevant.

I then, basically, pasted in the faulty PGN and replaced the 'GCgc' text with 'EBeb' - and then the analysis worked.  So if you still have any earlier games you want to analyse, this might work for you, too.

EDIT: Quick follow-up.  Just tried the solution above with a different game, and it didn't work.  I also now know that the 'EBeb'/'GCgc' text refers to castling rights, where in 960 the each letter corresponds to the position of the rooks.  Maybe my switching the notation in the game that worked only tolerated it because no castling occurred in that game.

I remain a bit baffled.

I've sent a bug report to chess.com.  I'll post back here with any insight I get from them.

I got this too twice today with GothamChess vs Emet_Selch1990 game loaded from Archive.

Chess > Learn > Analysis > Load from Archive GothamChess Emet_Selch1990 > Game Review

When I download the game I get some weird info in the metadata and the filename was off: __vs_______.__.__ (1).pgn

[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "1-0"]

1. d4 d5 2. Bf4 Bf5 3. e3 e6 4. c4 Nf6 5. Nc3 Bd6 6. Bg3 c6 7. Qb3 Qc7 8. Bxd6
Qxd6 9. Qxb7 Nfd7 10. c5 Nxc5 11. dxc5 Qd7 12. Qxd7+ Nxd7 13. Na4 Rb8 14. Nf3
O-O 15. Nd4 Bg6 16. Nxc6 Nxc5 17. Nxc5 Rxb2 18. Ne7+ Kh8 19. Nxg6+ hxg6 20. Be2
Kg8 21. Nd3 Rc2 22. f3 Rfc8 23. Kf2 f5 24. Rhc1 e5 25. Rxc2 Rxc2 26. Nxe5 g5 27.
Rd1 Rxa2 28. Rxd5 Kf8 29. Rd7 Ke8 30. f4 g4 31. Rxg7 a5 32. Ke1 a4 33. Bb5+ Kf8
34. Rf7+ Kg8 35. Bc4 Rb2 36. Re7+ Kf8 37. Ng6# 1-0

I saw this game played here: https://youtu.be/11iBvVprq5w?t=3307