[mchendriks]

I updated Calibre and after that when I want to manage a serie I get the following error description:


calibre, version 5.0.1
ERROR: Unhandled exception: <b>TypeError</b>:'<=' not supported between instances of 'NoneType' and 'NoneType'

calibre 5.0.1 embedded-python: True is64bit: True
Linux-5.4.0-48-generic-x86_64-with-glibc2.2.5 Linux ('64bit', 'ELF')
('Linux', '5.4.0-48-generic', '#52-Ubuntu SMP Thu Sep 10 10:58:49 UTC 2020')
Python 3.8.5
Interface language: None
Successfully initialized third party plugins: BOL_NL (4, 5, 0) && Find Duplicates (1, 7, 2) && Kobo Utilities (2, 11, 5) && Manage Series (1, 2, 9) && Modify ePub (1, 4, 1) && Open With (1, 5, 12) && Quality Check (1, 10, 1)
Traceback (most recent call last):
File "calibre_plugins.manage_series.action", line 58, in manage_series
File "calibre_plugins.manage_series.dialogs", line 362, in __init__
File "calibre_plugins.manage_series.dialogs", line 587, in renumber_series
TypeError: '<=' not supported between instances of 'NoneType' and 'NoneType'