Doing anything results in "unexpected document type"

I'm running Arch Linux with bti 034. I installed the package `bti-git` from the AUR.

```
$ bti
tweet: Test
unexpected document type
operation failed
$ bti --action friends
unexpected document type
unexpected document type
operation failed
```

My `~/bti`:

```
account=<username>
password=<password>
host=quitter.se
```

Am I doing something wrong?