No module named 'utils'

Hello!
This error raised when evaluating performance on VOT. In git bash, how can I resolve this problem?How to consider PYTHONPATH design?

$ bash test_mask_refine.sh config_vot.json SiamMask_VOT.pth VOT2016 0
Traceback (most recent call last):
File "C:/Users/lenovo/SiamMask/tools/test.py", line 18, in
from utils.log_helper import init_log, add_file_handler
ModuleNotFoundError: No module named 'utils'

I'm in a hurry. Many thanks!