In Koha version 25.11, when editing a record and opening the edit window of MARC field 008, the following error occurs: Can't validate the xml data from /usr/share/koha/intranet/htdocs/intranet-tmpl/prog/es-ES/data/marc21_field_008.xml Is this possibly a problem in the spanish version?
It's not just the Spanish version. It's a known issue: bug 41481 It should be fixed soon *** This bug has been marked as a duplicate of bug 41481 ***
Thanks for reporting this issue though!