Fail to render / load Japanese fonts

Japanese pdf is not rendered nextcloud 28 clean installation. A blank page is displayed.
The cause is that some static files, including the bcmap file, have not been retrieved.

The following files can be successfully retrieved without authentication. (apache responds 200)

• https://FQDN/apps/files_pdfviewer/js/pdfjs/build/pdf.js
• https://FQDN/apps/files_pdfviewer/js/pdfjs/web/viewer.js

The following file is not found.(apache responds 404)

• https://FQDN/apps/files_pdfviewer/js/pdfjs/web/cmaps/Adobe-Japan1-UCS2.bcmap
• https://FQDN/apps/files_pdfviewer/js/pdfjs/web/locale/locale.properties

I seem to have a problem with static file routing.
Any advice on how to correct this would be appreciated.

sample pdf:
https://hikaku.cman.jp/pdf/sample/pdf_font_none.pdf

Server configuration

Deployed dockerhub image 28-apache

List of activated apps:

default apps

Nextcloud configuration:

default

Client configuration

Browser:
chrome, firefox
It's not a browser matter. I confirmed 404 response with the curl command.

Reproduce the failure with the sample PDF and curl the listed pdf.js, bcmap, and locale paths in a Nextcloud 28 Apache deployment. Inspect how the files_pdfviewer static assets are packaged and routed, then verify the missing files return 200 and the Japanese PDF renders without a blank page.