DEDRM failed?

Hi! this is just 1 of the books that I am DeDRM-ing and other books also doesn't work.

ApplicationPaletteChange event ignored Using calibre Qt style: True ApplicationPaletteChange event received calibre Debug log calibre 7.14 embedded-python: True Windows-10-10.0.19045-SP0 Windows ('64bit', 'WindowsPE') ('Windows', '10', '10.0.19045') Python 3.11.5 Windows: ('10', '10.0.19045', 'SP0', 'Multiprocessor Free') Interface language: None EXE path: C:\Program Files\Calibre2\calibre-debug.exe Successfully initialized third party plugins: DeDRM (7, 2, 1) && Obok DeDRM (7, 2, 1) calibre 7.14 embedded-python: True Windows-10-10.0.19045-SP0 Windows ('64bit', 'WindowsPE') ('Windows', '10', '10.0.19045') Python 3.11.5 Windows: ('10', '10.0.19045', 'SP0', 'Multiprocessor Free') Interface language: None EXE path: C:\Program Files\Calibre2\calibre-debug.exe Successfully initialized third party plugins: DeDRM (7, 2, 1) && Obok DeDRM (7, 2, 1) QPA platform: windows devicePixelRatio: 1.25 logicalDpi: 96.0 x 96.0 physicalDpi: 126.26019417475726 x 126.85317919075145 [0.00] Starting up... [0.00] Showing splash screen... [0.16] splash screen shown [0.16] Initializing db... [0.17] db initialized [0.17] 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 [0.58] GUI main window shown [0.61] main UI initialized... [0.61] Hiding splash screen DeDRM v7.2.1: Trying to decrypt Grammar for Grown-Ups A Comprehensive Guide and Workbook to Boost Your Writing Skills (Mark Peters) (z-library.sk, 1lib.sk, z-lib.sk).epub DeDRM v7.2.1: Verifying zip archive integrity DeDRM v7.2.1: “Grammar for Grown-Ups A Comprehensive Guide and Workbook to Boost Your Writing Skills (Mark Peters) (z-library.sk, 1lib.sk, z-lib.sk).epub” is neither an Adobe Adept nor a Barnes & Noble encrypted ePub Running file type plugin DeDRM failed with traceback: Traceback (most recent call last): File "calibre\customize\\ui.py", line 199, in _run_filetype_plugins File "calibre_plugins.dedrm.init", line 644, in run File "calibre_plugins.dedrm.init", line 420, in ePubDecrypt calibre_plugins.dedrm.DeDRMError: DeDRM v7.2.1: Couldn't decrypt after 0.4 seconds. DRM free perhaps? [3.64] splash screen hidden [3.64] Started up in 3.64 seconds with 4 books stdout+stderr from file dialog helper: [b'', b''] piped data from file dialog helper: [b'5a%H=\xb2\x97\x17s7\xc2\xe5)\x81\xc4\x84\x80\xef\x07\xe7\x02\xeco\xd6\xb5\x88\xdaP8)\x0fW', b'C:\Users\rmmde\Downloads\Grammar for Grown-Ups A Comprehensive Guide and Workbook to Boost Your Writing Skills (Mark Peters) (z-library.sk, 1lib.sk, z-lib.sk).epub'] Added Grammar for Grown-ups to db in: 0.2