Stockfish just has -8,14 against Allie in TCEC draw!

[Jouni]

[pgn]1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6 7. Be3 Be7 8. g4 h6 9. h4 b5 10. a3 Bb7 11. Bf3 Nc6 12. Nxc6 Bxc6 13. e5 Nd5 14. Nxd5 exd5 15. Qd4 dxe5 16. Qxe5 O-O 17. O-O-O Bf6 18. Qf5 g6 19. Qd3 Bg7 20. Bxd5 Bxd5 21. Qxd5 Qf6 22. Qb3 Qf3 23. h5 g5 24. Bc5 Qxb3 25. cxb3 Rac8 26. Rd5 Bd4 27. b4 Bxf2 28. Rf1 Bxc5 29. bxc5 Rfe8 30. b4 Re4 31. Rf6 Kg7 32. Rxa6 Rxg4 33. Rd7 Rf4 34. Rg6+ Kh7 35. c6 g4 36. Kd2 Kh8 37. Rgd6 Rc4 38. Rxh6+ Kg8 39. Rd5 Kg7 40. Rhd6 R4xc6 41. Rg5+ Kh7 42. Rxc6 Rxc6 43. Rxg4 Ra6 44. Rf4 Kg7 45. Kd3 Rxa3+ 46. Kd4 Rg3 47. Rf5 f6 48. Rxb5 Rg4+ 49. Kc3 Rg3+ 50. Kc2 Rg4 51. Kc3 Rg3+ 52. Kc2 Rg4 53. Kb3 Rg3+ 54. Kb2 Rg2+ 55. Ka3 Rg3+ 56. Kb2 Rg2+ 57. Kb3 Rg3+ 58. Kc4 Rg4+ 59. Kd3 Rg3+ 60. Kd2 Rf3 61. Rc5 Kh6 62. b5 f5 63. Kc2 Rf4 64. Kc3 Rf1 65. Kb2 Rf4 66. Kc3 Rf1 67. Kb2 Rf4 1/2-1/2[/pgn]
What happened? SF is black.

[Jouni]

Allie misses easy win

Analysis by Stockfish 181220:
...
37.Rxh6+ Kg7 38.Rg6+ Kh8 39.Rgd6 Rf2+ 40.Ke1 Rc2 41.Rf6 R2xc6 42.Rfxf7 Rh6 43.Rf5 g3 44.Rg5 Rc2 45.Kd1 Rc3 46.Rxb5 Rc8 47.Rg5 Rc3 48.Rd8+ Kh7 49.Kd2 Rxa3 50.Rd7+ Kh8 51.Rd3 Ra2+ 52.Kc3 Ra3+ 53.Kc4 Rc6+ 54.Kd5 Rxd3+ 55.Kxc6 Rc3+ 56.Kb6 Kh7 57.Rg6 Re3 58.b5 Rc3 59.Kb7 Kh8 60.Ka6 Kh7 61.Kb6 Kh8 62.Ka5 Rf3 63.Kb4 Rf4+ 64.Kb3 Rf3+ 65.Kc4 Kh7 66.Kb4 Rf4+ 67.Kc5 Rf5+ 68.Kc6 Rf3 69.b6 Rc3+ 70.Kd7 Re3 71.Kc7 Rb3 72.Kb7 Rf3
+- (2.13) Depth: 56/95 00:08:16 4864mN, tb=36351323
37.Rxh6+
+- (2.21 ++) Depth: 57/38 00:09:02 5324mN, tb=40514308
37.Rxh6+
+- (2.29 ++) Depth: 57/40 00:09:41 5721mN, tb=43602260
37.Rxh6+
+- (2.42 ++) Depth: 57/40 00:10:15 6063mN, tb=45823238
37.Rxh6+
+- (2.60 ++) Depth: 57/40 00:10:35 6276mN, tb=47190846
37.Rxh6+
+- (2.84 ++) Depth: 57/40 00:10:50 6432mN, tb=48194075
37.Rxh6+
+- (3.17 ++) Depth: 57/40 00:11:19 6739mN, tb=50355015
37.Rxh6+
+- (3.60 ++) Depth: 57/53 00:12:21 7382mN, tb=54673276

But what was SF decisive error?