FB 7430, os 06.83: FC expects JSON, gets XML.

[n952162]

I get this far (in e.g. fritzbox_power_consumption.py):

xhr_data = fh.get_xhr_content(server, session_id, PAGE)
print ("DEBUG: got header content %s" % xhr_data, file=sys.stderr)
data = json.loads(xhr_data)

But xhr_data starts out:

<script>if (typeof jxl === \'undefined\')

Is it necessary and sufficient to upgrade to OS 7?
Am I out of date or is fritzconnection out of date?