AssertionError when creating instance of Spot67Scene

With SPOT image from https://ids-dinamis.data-terra.org/web/guest/catalog1

image selected with coordinates N : 45.4924, E : 6.6502, S : 45.3072, W : 6.3426, year : 2020, "Image brute" :

• 2020-07-08_10:09:55.539_SPOT6_SENSOR_MS
• 2020-07-08_10:09:55.538_SPOT6_SENSOR_P

When creating instance of Spot67Scene

from scenes.spot import Spot67Scene
sc = Spot67Scene(dimap_file_xs="/path/to/DIM_SPOT6_MS_..._1.XML",
                 dimap_file_pan="/path/to/DIM_SPOT6_P_..._1.XML")

Getting assertion error :

Traceback (most recent call last):
  File "/usr/lib/python3.8/code.py", line 90, in runcode
    exec(code, self.locals)
  File "<input>", line 1, in <module>
  File "/home/josselingiffard/.local/lib/python3.8/site-packages/scenes/spot.py", line 323, in __init__
    epsg_xs, extent_wgs84_xs, self.bbox_wgs84_xs = get_epsg_extent_bbox(dimap_file_xs)
  File "/home/josselingiffard/.local/lib/python3.8/site-packages/scenes/raster.py", line 108, in get_epsg_extent_bbox
    epsg = get_epsg(gdal_ds)
  File "/home/josselingiffard/.local/lib/python3.8/site-packages/scenes/raster.py", line 24, in get_epsg
    assert str(epsg).isdigit()
AssertionError