Hello,
i've used a template for saving books to disk:
{publisher:.2}/{publisher}/{series:sublist(0,1,.)}/{series:sublist(1,2,.)}/{series:sublist(2,3,.)}/{series:sublist(3,4,.)}/{series:sublist(4,5,.)}/{title}_{series_index}/{title}
It works for me and I had no problems with this template until version 8.6 of calibre.
Now, when I try to edit the template and use apply calibre throws this error:
calibre, version 8.6.0
ERROR: Invalid template: <p>The template {publisher:.2}/{publisher}/{series:sublist(0,1,.)}/{series:sublist(1,2,.)}/{series:sublist(2,3,.)}/{series:sublist(3,4,.)}/{series:sublist(4,5,.)}/{title}_{series_index}/{title} is invalid:<br>'ValidateFormatter' object has no attribute '_validation_string'
When using the template there is no error and calibre also show no error, when using the template in the template editor. Only If I want to apply the template on the tab setting "Saving books to disk".
Greetings from the Muensterland
Maria