When trying to run GRS, the program cannot find the NC file?

[shimianxian]

When I run the following code:
grs /home/lk/grs-master/test/data/S2B_MSIL1C_20180927T103019_N0206_R108_T31TGK_20180927T143835.SAFE --shape /home/luokai/grs-master/test/data/shape/SPO04.shp --odir /home/lk/grs-master/test/results/ --aerosol cams_forecast --dem --resolution 20
An error message appears:
FileNotFoundError: [Errno 2] No such file or directory: b'/usr/local/lib/python3.8/dist-packages/grs-1.3.2-py3.8.egg/grs/CAMS/2018/2018-09_month_cams_forecast.nc'
I've tried for many days, but I can't find a solution？
I doubt whether the configuration in config.py is incorrect.

data_root = os.path.abspath('/usr/local/lib/python3.8/dist-packages/grs-1.3.2-py3.8.egg/grs/')
tmp_dir = os.path.join(data_root,"tmp")
lut_root = os.path.join(data_root, "LUT")
cams_folder = os.path.join(data_root, "CAMS")
smac_root = os.path.join(data_root, "SMAC_COEFS")

Who can tell me how to solve this problem?