[TornSoul]

Calibre no longer opens epub files.
Double-clicking file in calibre and nothing happens (no error message or anything)

pdf works fine (opens in browser so..)

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Win 10
Nvidia 1070ti
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Updated to latest nvidia drivers (516.94)
To be sure I've manually associated ebook-viewer.exe with .epub
Updated to latest calibre 6.2.1 (64 bit)
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calibre-debug -w gives me the following


Failed to import PyQt module: PyQt6.QtWebEngineCore with error: DLL load failed while importing QtWebEngineCore: The specified module could not be found.
Traceback (most recent call last):
File "runpy.py", line 196, in _run_module_as_main
File "runpy.py", line 86, in _run_code
File "site.py", line 82, in <module>
File "site.py", line 77, in main
File "site.py", line 49, in run_entry_point
File "calibre\debug.py", line 231, in main
File "calibre\gui_launch.py", line 80, in ebook_viewer
File "bypy-importer.py", line 279, in exec_module
File "calibre\gui2\viewer\main.py", line 15, in <module>
File "bypy-importer.py", line 279, in exec_module
File "calibre\gui2\viewer\ui.py", line 29, in <module>
File "bypy-importer.py", line 279, in exec_module
File "calibre\gui2\viewer\annotations.py", line 13, in <module>
File "bypy-importer.py", line 279, in exec_module
File "calibre\gui2\viewer\web_view.py", line 14, in <module>
ImportError: cannot import name 'QWebEnginePage' from 'qt.webengine' (C:\Program Files\Calibre2\app\bin\python-lib.bypy.frozen\qt\webengine.pyc)