So The road barrels and everything else is working perfect, Barrels near caves and in rad towns are vanilla. I dont get it please help :)

For some reason they left those barrels out.
Copy one of the other barrel configs and paste it, then change the barrel name to "assets/bundled/prefabs/autospawn/resource/loot/loot-barrel-1.prefab"

edit: apparently there are 2, so also add "assets/bundled/prefabs/autospawn/resource/loot/loot-barrel-2.prefab"

appreciate it :)