Ok, so there is an issue with the comic book archive handling.

There is one thing in your Docker file which strikes me as particularly odd - your install libunarr-dev as a build dependency and you are downloading the unarr source for an embedded build.

Only one of these is needed. Could you try to rebuild YACReader 9.8.0 with only libunarr-dev but not the extra source code? This is the configuration I use on my system and for packaging and for me this works fine.

Yep, I tryed a clean install as you asked and works- the install process

My conclusions about the topic (guys I'm totally noob about any of the matter, forgive me if I'm wrong):
- My lib is totally using WEBP inside CBZ files
- This worked up to 9.7.1 headless
- That's why the compiled rpi version didn't find the files, the system can't handle the image format

OK

- Running the rebuild 9.8.0 headless on updated DB
- It can't open files. Server stop running when try to open any CBZ/WEBP
- If I put a new folder with CBZ/WEBP and update server, the folder is not listed, DB completelly ignore the folder
- If the same files are insted CBZ/JPG it worked - navigate, open folder, write to DB
- CBZ/WEBP is dead. Long live CBZ/JPG

Luckly I have a backup with only JPG files but it's triple the size with almost the same quality

Ah now it makes sense. I think I have an idea what is happening here.

Please do the following:

- double check that the Qt image format plugin for WEBP is installed
- open a bug on our Github (www.github.com/yacreader/yacreader)
- create a small test .cbz with WEBP images and upload it for testing

If this is what I think it is the fix should be very straightforward.

You totally nailed! qt5-imageformats was missing.

By adding qt5-image-formats-plugins (for debian) and libwebp6 in the Dockerfile, now support all image formats.

Should I still open the ticket on Github?

No, in that case everything is working as it should and there is no bug Happy reading!

Thanks a lot selmf and Luis Ángel!

YAC is the best comic reader ever!

Saludos!