In /usr/share/koha/intranet/htdocs/intranet-tmpl/prog/sv-SE/modules/serials/subscription-add.tt:509 This row: var mana_enabled = [% IF (Koha.Preference('Mana') == 1 && mana_url) %]1[% ELSE %][% END %]; Should be: var mana_enabled = [% IF (Koha.Preference('Mana') == 1 && mana_url) %]1[% ELSE %]0[% END %]; like it is in the english version.
This has already been fixed in the most current versions: [%- IF (Koha.Preference('Mana') == 1 && mana_url) -%] var mana_enabled = 1; [%- ELSE -%] var mana_enabled = 0; [%- END -%] var BOOKSELLER_IDS = [% To.json( bookseller_ids ) || '[]' | html %]; I am closing as RESOLVED FIXED. If you are using a maintained version (21.05 and above) and still have this issue, please reopen.