Nextcloud 28 download error

Hi all,

After upgrading to nextcloud 28 I got issues with downloading multiple files or folder through the webgui, when clicking the download button, it tries to download a htm file instead of generating a zip. looking at the log files I get the following error in the nginx log:

"OC_Util" not found in /config/www/nextcloud/apps/files/ajax/download.php:31

I reported this to nextcloud but they claim the issue is likely with the image I use, which is the linuxserver docker container. Is this a known issue with the image or my config?

details of my config:
OS: Unraid 6.12.6
Current nextcloud version:
Database: PostgreSQL 14
reverse proxy: Swag docker

Anyone experiencing the same?