all the mods are working fine.
The only issue is that when you install the mod pack for the first time, there is more than 160 Mo to download.
Depending on your connection, some files are not correctly downloaded.
You might have files with 0 kb of size.
As i have not implemented a CRC or MD5 check, the loader consider that all the files are always complete which could not be the case.
- Go in the folder where you have copied the "materials.cs.dso" file.
- Delete the "modclient.xml" file, it will force a full download of the files
- Relaunch your game
- If it still fails, send me the logs or download manually the empty files for this web site http://lifeisfeudal.fr/mod/.
I am available on discord to provide support.