save as html5 canvas fails (0.92.4)

Steps to reproduce:

• open Inkscape
• create an object, e.g. a box
• save as HTML5 canvas (.html)

What happened?

Dialog box appears:

Inkscape has received additional data from the script executed. The script did not return an error, but this may indicate the results will not be as expected.

Traceback (most recent call last): File "ink2canvas.py", line 91, in ink.affect() File "inkex.py", line 283, in affect self.effect() File "ink2canvas.py", line 86, in effect self.walk_tree(svg_root) File "ink2canvas.py", line 77, in walk_tree self.walk_tree(node) File "ink2canvas.py", line 73, in walk_tree if elem.has_gradient(): File "ink2canvas/svg.py", line 102, in has_gradient style = self.get_style() File "ink2canvas/svg.py", line 75, in get_style style = dict([(str.strip(k), str.strip(v)) for k,v in style.items()]) TypeError: descriptor 'strip' requires a 'str' object but received a 'unicode'

What should have happened?

creating a HTML5-file

Inkscape Version and Operating System:

• Inkscape Version: Inkscape 0.92.4 (5da689c313, 2019-01-14)
• Operating System: Windows
• Operating System version: 8.1