View raw files like CR2

I would like to kwnow how can I view raw files like CR2 or ARW. I have installed CameraRaw Preview, and I preview those files, but when I clik on I download the file.
Thank’s for an idea.

Hi, does your installation fulfill all requirements? GitHub - ariselseng/camerarawpreviews: Camera Raw Previews app for Nextcloud

Yes , I think so. Imagick is installed. My config → Debian 10.9, Yunohost et Nextcloud 20.0.7 with 6go of memory.