Remarkable aborts startup due to "Attribute Error"

[ghost]

remarkable
/usr/lib/python3/dist-packages/pdfkit/source.py:11: SyntaxWarning: "is" with a literal. Did you mean "=="?
if self.type is 'file':
*Spellchecking not enabled.
*To enable spellchecking install pygtkspellcheck
*https://pypi.python.org/pypi/pygtkspellcheck/
Traceback (most recent call last):
File "/usr/bin/remarkable", line 66, in
remarkable.main()
File "/usr/lib/python3/dist-packages/remarkable/init.py", line 49, in main
window = RemarkableWindow.RemarkableWindow()
File "/usr/lib/python3/dist-packages/remarkable_lib/Window.py", line 52, in new
builder = get_builder('RemarkableWindow')
File "/usr/lib/python3/dist-packages/remarkable_lib/helpers.py", line 48, in get_builder
builder.add_from_file(ui_filename)
File "/usr/lib/python3/dist-packages/remarkable_lib/Builder.py", line 92, in add_from_file
ele_widgets = tree.getiterator("object")
AttributeError: 'ElementTree' object has no attribute 'getiterator'

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The error only occurs when using the .deb file which can be downloaded from your website. When clone the git repository it works fine.