json.loads Error - related to Python 3?

[JanKoppe]

After finishing the recording command, the safe_start_capture() method fails with the following error:

2016-11-17 22:20:01 ERROR    [ca.py:395:safe_start_capture()] Start capture failed
2016-11-17 22:20:01 ERROR    [ca.py:396:safe_start_capture()] Traceback (most recent call last):
  File "/home/jan/git/electures/pyca/pyca/ca.py", line 393, in safe_start_capture
    return start_capture(event)
  File "/home/jan/git/electures/pyca/pyca/ca.py", line 256, in start_capture
    attachments = event.get_data().get('attach')
  File "/home/jan/git/electures/pyca/pyca/db.py", line 69, in get_data
    return json.loads(self.data)
  File "/usr/lib/python3.5/json/__init__.py", line 312, in loads
    s.__class__.__name__))
TypeError: the JSON object must be str, not 'bytes'

This was run on Arch Linux using Python 3.5.2. When run on the same system but with Python 2.7.12, it works just fine.