My submission always failed

Hello,
I am interested in this challenge:https://eval.ai/web/challenges/challenge-page/97
I tried to submit my file but the Status result is always “Failed” with the following Stderr message.

‘’’
Traceback (most recent call last):
File “/code/scripts/workers/submission_worker.py”, line 538, in run_submission
submission_metadata=submission_serializer.data,
File “/tmp/tmp7pjn72f_/compute/challenge_data/challenge_97/main.py”, line 152, in evaluate
print(ev.score(user_annotation_file))
File “/tmp/tmp7pjn72f_/compute/challenge_data/challenge_97/main.py”, line 109, in score
self.score_item(item[‘instr_id’], item[‘trajectory’])
File "/tmp/tmp7pjn72f
/compute/challenge_data/challenge_97/main.py", line 89, in _score_item
self.graphs[gt[‘scan’]][prev[0]][curr[0]]
File “/usr/local/lib/python3.7/site-packages/networkx/classes/coreviews.py”, line 51, in getitem
return self._atlas[key]
KeyError: ‘86505f3c38e84f2fbd18097bf5aa043f’
‘’’

Thank you