@PetrusV
How did you define the custom column in Calibre?
And you are aware that ‘
column built from other columns’ (called composite columns)
* do not work in COPS?
* Source "composite column:
https://manual.calibre-ebook.com/template_lang.html
More "simple" custom columns do work in cops.
$config['cops_calibre_custom_column'] = array ("test");
$config['cops_calibre_custom_column_list'] = array ("test");
Don't forget to reload cops (F5?) in your browser. (and test in calibre first)