Actually, Daniel's message is detailed enough that I know exactly which
section of your code is buggy and how to fix it. If you want to be
positive, play through his game, or ask your programmers to do the
same, and they'll see, too.

May be you get disconnected.

No, that wasn't the problem.

Ok I Replayed the Game with Beginner Level without Login and Same game
was played

1. e4 e5
2. Nf3 Nc6
3. Be2 d5
4. O-O dxe4
5. Nxe5 Nxe5
6. Bb5+ c6
7. Qh5 Bd6
8. d4 Bg4
9. Qg5 Qxg5
10. Bxg5 b5
11. dxe5 Bxe5
12. Nd2 h6
13. Rae1 hxg5
14. Rxe4 O-O-O
15. Nf3 Bf4
16. Ne5 Bh2+
17. Kh1 Bxe5
(HERE YOU are GETTING CHECK by ROOK at h8)
When you took Bishop at e5 by Rxe5 Your king being Checked by Rook at
h8

So 18: Rxe5 Rxh1 (And you king is Mated)

18. Rxe5 (board reset and the move showing in the list was Black moved
Rh1).