also running into this when trying to create kindle collections:
unhashable type: 'list'
Traceback (most recent call last):
File "site-packages/calibre/gui2/device.py", line 87, in run
File "calibre_plugins.kindle_collections.create_preview ", line 67, in create
File "calibre_plugins.kindle_collections.kindle_boo ks", line 37, in init
File "calibre_plugins.kindle_collections.kindle_boo ks", line 60, in __init__
File "calibre_plugins.kindle_collections.kindle_boo ks", line 358, in load_kindle_books
TypeError: unhashable type: 'list'
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