I get the following warning:
Status: failed
Processing content.opf...
ibooks:
http://vocabulary.itunes.apple.com/r...xtensions-1.0/ calibre:
https://calibre-ebook.com package prefix attribute deleted.
Package updated.
Mapping refines...
"Krinar-kronieken 0,5 - De Krinar-onthulling" file:as refines title attribute mapped to calibre:title_sort attribute
"main" title-type refines property IGNORED.
"Zaires, Anna" file:as refines attribute mapped to opf:file-as attribute
"aut" role refines attribute mapped to opf:role attribute
"Ivers, Hettie" file:as refines attribute mapped to opf:file-as attribute
"aut" role refines attribute mapped to opf:role attribute
"series" collection-type refines property IGNORED.
"Krinar-kronieken" belongs-to-collection refines attribute mapped to calibre:series attribute
"0.5" group-position refines attribute mapped to calibre:series_index attribute
Traceback (most recent call last):
File "D:\Program Files\Sigil\plugin_launchers\python\launcher.py", line 136, in launch
self.exitcode = target_script.run(container)
File "C:\Users\boeke\AppData\Local\sigil-ebook\sigil\plugins\ePub2\plugin.py", line 215, in run
metadata.find(id=dc_id)['opf:role'] = refine.string
TypeError: 'NoneType' object does not support item assignment
Error: 'NoneType' object does not support item assignment
Date en Time are good.