Alright, took another look into the docs. I’ve chown’ed the config and data folder now to 1000:1000, which works. (Even though the gid and uid in Unraids Settings are 99 and 100, I really don’t understand file permissions …) Also, not sure if it’s documented somewhere, but you have to remove the init post-argument after the first initialization, otherwise OpenCloud tries to create a new config on every launch and fails if one already exists.