I ran into something a little confusing and something else that might be a bug.
There are two slightly different flags that deal with sending a file vs sending a path when adding data. There's
stardog-admin db create --copy-server-side and then there's
stardog data add --server-side. I believe they're opposites of each other since the two commands have opposite defaults but it's not immediately clear that copy-server-side is opposite of server-side. Not a big deal but easy to confuse.
stardog-admin --copy-server-side works as expected. The problem I'm seeing is that I get the same server side error with and with or without the --server-side argument.
It's as though it's defaulting to --server-side and ignoring that the flag isn't there.