[Quoth]

Updated calibre just now, still broken

The rather slower "Annotations" plugin, which is more awkard for my work flow nearly works. The last few annotations are not copied.

calibre, version 3.46.0
ERROR: Unhandled exception: <b>TypeError</b>:unsupported operand type(s) for *: 'NoneType' and 'int'

calibre 3.46  embedded-python: True is64bit: True
Linux-4.15.0-54-generic-x86_64-with-debian-stretch-sid Linux ('64bit', 'ELF')
('Linux', '4.15.0-54-generic', '#58~16.04.1-Ubuntu SMP Mon Jun 24 13:21:41 UTC 2019')
Python 2.7.15
Linux: ('debian', 'stretch/sid', '')
Interface language: None
Successfully initialized third party plugins: Gather KFX-ZIP (from KFX Input) (1, 17, 1) && DeDRM (6, 6, 1) && K4PC, K4Mac, Kindle Mobi and Topaz DeDRM (0, 3, 1) && Package KFX (from KFX Input) (1, 17, 1) && KePub Metadata Reader (3, 0, 2) && EpubSplit (2, 7, 0) && KoboTouchExtended (3, 1, 5) && Wiki Reader (2, 1, 0) && Quality Check (1, 9, 11) && Annotations (1, 9, 2) && Kindle Collections (1, 7, 24) && KePub Metadata Writer (3, 0, 3) && Library Splitter (1, 0, 1) && Smashwords Metadata (1, 0, 0) && Author Book Count (2, 1, 6) && Copy Cover To Device (2, 0, 0) && Resize Cover (1, 0, 2) && Manage Sony x50 Reader Book List (1, 2, 11) && Kobo Utilities (2, 8, 0) && X-Ray Creator (3, 2, 1) && Generate Cover (1, 5, 21) && Kindle covers (G) (0, 3, 0) && Amazon.com Multiple Countries (1, 0, 0) && Open With (1, 5, 10) && Goodreads (1, 4, 0) && Quick Preferences (1, 4, 1) && KindleUnpack - The Plugin (0, 81, 5) && Hyphenate This! (0, 0, 8) && Kobo Books (1, 7, 0) && Find Duplicates (1, 6, 3) && Barnes & Noble (1, 2, 15) && FictionDB (1, 2, 0) && Kindle hi-res covers (0, 4, 0) && Extract ISBN (1, 4, 4) && Reading List (1, 6, 6) && EpubMerge (2, 5, 0) && KFX metadata reader (from KFX Input) (1, 17, 1) && KFX Input (1, 17, 1) && Modify ePub (1, 3, 13) && Obok DeDRM (6, 5, 4) && Manage Series (1, 2, 8) && Media File Importer (1, 0, 21) && KePub Output (3, 1, 3) && EpubCheck (0, 1, 9) && KePub Input (3, 0, 0)
Traceback (most recent call last):
  File "calibre_plugins.koboutilities.action", line 1906, in getAnnotationForSelected
  File "calibre_plugins.koboutilities.action", line 2644, in _getAnnotationForSelected
  File "site-packages/calibre/devices/kobo/driver.py", line 1191, in get_annotations
  File "site-packages/calibre/devices/kobo/bookmark.py", line 30, in __init__
  File "site-packages/calibre/devices/kobo/bookmark.py", line 94, in get_bookmark_data
TypeError: unsupported operand type(s) for *: 'NoneType' and 'int'