OSError: cannot identify image file

[tisto]

OSError: cannot identify image file <_io.FileIO name='/var/folders/zw/wqv1f2gd4zdc43t1j834x5580000gn/T/tmps347cvd0.demoblobs/0x03/0x72/0x30/0x3a/0x1e/0x51/0x4a/0xac/0x03d9e2c29d996a11.blob' mode='rb' closefd=True>
ERROR:kitconcept.volto.scaling:Could not scale "<plone.namedfile.file.NamedBlobImage object at 0x10fae1ad0 oid 0x372303a1e514aa9 in <Connection at 110f97850>>" of 'http://localhost:55001/plone/image.png'
Traceback (most recent call last):
  File "/Users/timo/.buildout/eggs/kitconcept.volto-1.4.0-py3.7.egg/kitconcept/volto/scaling.py", line 83, in __call__
    **parameters
  File "/Users/timo/.buildout/eggs/kitconcept.volto-1.4.0-py3.7.egg/kitconcept/volto/scaling.py", line 32, in create_scale
    data, direction=direction, height=height, width=width, **parameters
  File "/Users/timo/.buildout/eggs/plone.scale-3.0.3-py3.7.egg/plone/scale/scale.py", line 55, in scaleImage
    image = PIL.Image.open(image)
  File "/Users/timo/.buildout/eggs/Pillow-6.2.1-py3.7-macosx-10.15-x86_64.egg/PIL/Image.py", line 2818, in open
    raise IOError("cannot identify image file %r" % (filename if filename else fp))