AttributeError: AndroidVector instance has no attribute 'etree'

[wrohdewald]

Tried with Inkscape 0.92 on Debian bullseye

I got

The document viewBox attribute is missing.
Traceback (most recent call last):
File "androidvector.py", line 309, in
vector.affect()
File "/usr/share/inkscape/extensions/inkex.py", line 285, in affect
self.output()
File "androidvector.py", line 101, in output
self.etree.write(sys.stdout, pretty_print=True)
AttributeError: AndroidVector instance has no attribute 'etree'