Strata Definition Error

[vijay-spatial]

Hi
I am trying to run the CropMask.py and I am getting the following error
Main mission: SENTINEL
Tiles: 1
43QDB 5
Single stratum: False
Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/sen2agri_common.py", line 539, in execute
self.load_tiles()
File "/usr/lib/python2.7/site-packages/sen2agri_common.py", line 783, in load_tiles
self.strata = load_strata(self.args.filtered_strata, self.site_footprint_wgs84)
File "/usr/lib/python2.7/site-packages/sen2agri_common.py", line 382, in load_strata
raise Exception("Could not open stratum dataset", areas)
Exception: ('Could not open stratum dataset', '/mnt/data/archive/insitu/sangamner/Sangamner_p.shp')
Processor finished in 0:00:00.055471
Strata I have given here is the site polygon
Projection UTM/WGS84

Could you please help me to rectify this error
Thanks
Vijay