Test error

[domiyoo]

Error reported after submitting on Codelab:
Error:
Traceback (most recent call last):
File "/tmp/codalab/tmppu09jN/run/program/evaluate.py", line 78, in
tmp = json.load(open(submission_answer_file))
FileNotFoundError: [Errno 2] No such file or directory: '/tmp/codalab/tmppu09jN/run/input/res/result.json'

May I ask how to solve it?