I was uploading po files one by one. > https://launchpad.net/products/zwiki/+series/0.x/+pots/zwiki/ca/+upload Aha, this one works, unlike https://launchpad.net/products/zwiki/+series/0.x/+pots/zwiki/+upload I also went back and tried uploading a tar file with one pot and the corresponding po files. It says Sorry, a system error occurred, as before. Thanks!