Unable to Remove DRM with Obok

[srx00000]

Hello,I can't open DRM removed file and it seems to be the same situation as #1476?

calibre Debug log
calibre 4.23 [64bit] embedded-python: True is64bit: True
Windows-7-6.1.7601-SP1 Windows ('64bit', 'WindowsPE')
('Windows', '7', '6.1.7601')
Python 2.7.16+
Windows: ('7', '6.1.7601', 'SP1', u'Multiprocessor Free')
Interface language: None
Successfully initialized third party plugins: Obok DeDRM (6, 7, 0)
calibre 4.23 [64bit] embedded-python: True is64bit: True
Windows-7-6.1.7601-SP1 Windows ('64bit', 'WindowsPE')
('Windows', '7', '6.1.7601')
Python 2.7.16+
Windows: ('7', '6.1.7601', 'SP1', u'Multiprocessor Free')
Interface language: None
Successfully initialized third party plugins: Obok DeDRM (6, 7, 0)
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 72.035450517 x 72.0
Using calibre Qt style: True
[0.00] Starting up...
[0.00] Showing splash screen...
[0.30] splash screen shown
[0.30] Initializing db...
[0.30] db initialized
[0.30] Constructing main UI...
DEBUG: 0.0 obok::utilities.py - loading translations
DEBUG: 0.0 obok::dialogs.py - loading translations
DEBUG: 0.0 obok::config.py - loading translations
DEBUG: 0.0 obok::action_err.py - loading translations
[1.18] main UI initialized...
[1.18] Hiding splash screen
[3.93] splash screen hidden
[3.93] Started up in 3.93 seconds with 1 books
Running Obok DeDRM v6.7.0
DEBUG: 4.9 didn't find device
Obok v3.2.4
Copyright © 2012-2016 Physisticated et al.
c:\users\user\appdata\local\temp\tmpb8t2bs
DEBUG: 4.9 got kobodir C:\Users\User\AppData\Local\Kobo\Kobo Desktop Edition
Found 8 possible keys to try.
DEBUG: 8.6 BookListTableWidget:get_books - book_num: 0
DEBUG: 8.6 BookListTableWidget:get_books - book: ウマ娘 シンデレラグレイ【期間限定試し読み増量】 1
DEBUG: 8.6 InterfacePluginAction::launchObok - number of books to decrypt: 1
Obok DeDRM v6.7.0 - Decrypting ウマ娘 シンデレラグレイ【期間限定試し読み増量】 1
Trying key: 34a53d2d71ba450c8d7a71176145b798
Success!
Traceback (most recent call last):
File "site-packages\calibre\customize\ui.py", line 428, in get_file_type_metadata
File "site-packages\calibre\customize\builtins.py", line 195, in get_metadata
File "site-packages\calibre\ebooks\metadata\epub.py", line 218, in get_metadata
File "site-packages\calibre\ebooks\metadata\epub.py", line 156, in read_bytes
File "site-packages\calibre\utils\zipfile.py", line 999, in read
File "site-packages\calibre\utils\zipfile.py", line 1027, in open
File "site-packages\calibre\utils\zipfile.py", line 989, in getinfo
KeyError: u"There is no item named 'OPS/advanced.opf' in the archive"
DEBUG: 9.3 DecryptAddProgressDialog::do_book_action - decrypted book: 'ウマ娘 シンデレラグレイ【期間限定試し読み増量】 1'
Obok DeDRM v6.7.0 - Added bjve c
Obok DeDRM v6.7.0 - wrapping up results.

[ElleKayEm]

From the other similar issue, it looks like @apprenticeharper is at least aware of this problem, but I don't know when it might be resolved.