Opening the User Guide from the menu failed with this error.
Code:
calibre 5.3 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.19041-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.19041')
Python 3.8.5
Windows: ('10', '10.0.19041', 'SP0', 'Multiprocessor Free')
Interface language: None
Successfully initialized third party plugins: Barnes & Noble (1, 2, 16) && Calibre Power Search Plugin (1, 6, 0) && Clean Comments (0, 1, 0) && Comments Cleaner (1, 2, 1) && Count Pages (1, 10, 0) && Drop Search Results (1, 0, 10) && Embed Comic Metadata (1, 5, 0) && EpubCheck (0, 2, 3) && EpubMerge (2, 11, 0) && Extract ISBN (1, 5, 0) && FanFicFare (3, 24, 5) && Fantastic Fiction (1, 4, 0) && Favourites Menu (1, 0, 5) && Find Duplicates (1, 8, 3) && Generate Cover (1, 5, 25) && Goodreads (1, 5, 1) && Import List (1, 5, 1) && Job Spy (1, 0, 187) && Kindle hi-res covers (0, 5, 0) && Kobo Books (1, 8, 0) && Kobo Utilities (2, 11, 8) && KoboTouchExtended (3, 4, 1) && Library Codes (1, 0, 47) && Manage Series (1, 2, 11) && Modify ePub (1, 6, 1) && MultiColumnSearch (1, 0, 84) && Open With (1, 5, 12) && Quality Check (1, 10, 1) && Reading List (1, 6, 17) && Save To Format (0, 0, 6) && SmartEject (2, 3, 0) && View Manager (1, 5, 7)
Traceback (most recent call last):
File "calibre_plugins.multi_column_search.ui", line 3481, in view_user_instructions
File "calibre_plugins.multi_column_search.ui", line 3516, in extract_documentation_from_zip
TypeError: must be str, not bytes