Steps 22-24 in the "Reading_a_JWST_ASDF_file" notebook raise exceptions

[koubaa]

TypeError Traceback (most recent call last)
Input In [22], in <cell line: 2>()
1 wcs = af.tree['meta']['wcs']
----> 2 wcs(100,200)

TypeError: 'TaggedDict' object is not callable

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AttributeError Traceback (most recent call last)
Input In [23], in <cell line: 1>()
----> 1 wcs.invert(5.9, -72)

AttributeError: 'TaggedDict' object has no attribute 'invert'

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AttributeError Traceback (most recent call last)
Input In [24], in <cell line: 2>()
1 # what is the output coordinate frame and units?
----> 2 wcs.output_frame

AttributeError: 'TaggedDict' object has no attribute 'output_frame'