Crash with TypeError: Object of type bytes is not JSON serializable

[leplatrem]

 http :8888/v1/buckets "Accept:text/html,text/plain;q=0.9"

"GET   /v1/buckets?" ? (? ms) Object of type bytes is not JSON serializable errno=999
Traceback (most recent call last):
  File "/path/to/.venv/lib/python3.13/site-packages/pyramid/tweens.py", line 41, in excview_tween
    response = handler(request)
  File "/path/to/.venv/lib/python3.13/site-packages/kinto/core/events.py", line 166, in tween
    response = handler(request)
  File "/path/to/.venv/lib/python3.13/site-packages/pyramid/router.py", line 143, in handle_request
    response = _call_view(
        registry, request, context, context_iface, view_name
    )
  File "/path/to/.venv/lib/python3.13/site-packages/pyramid/view.py", line 674, in _call_view
    response = view_callable(context, request)
  File "/path/to/.venv/lib/python3.13/site-packages/pyramid/config/views.py", line 151, in __call__
    return view(context, request)
  File "/path/to/.venv/lib/python3.13/site-packages/pyramid/viewderivers.py", line 392, in viewresult_to_response
    result = view(context, request)
  File "/path/to/.venv/lib/python3.13/site-packages/pyramid/viewderivers.py", line 141, in _requestonly_view
    response = view(request)
  File "/path/to/.venv/lib/python3.13/site-packages/cornice/pyramidhook.py", line 72, in _fallback_view
    error = service.error_handler(request)
  File "/path/to/.venv/lib/python3.13/site-packages/kinto/core/__init__.py", line 128, in error_handler
    return errors.json_error_handler(request)
           ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/path/to/.venv/lib/python3.13/site-packages/kinto/core/errors.py", line 159, in json_error_handler
    response = http_error(
        httpexceptions.HTTPBadRequest(),
    ...<4 lines>...
        details=errors,
    )
  File "/path/to/.venv/lib/python3.13/site-packages/kinto/core/errors.py", line 120, in http_error
    response.json = ErrorSchema().deserialize(body)
    ^^^^^^^^^^^^^
  File "/path/to/.venv/lib/python3.13/site-packages/webob/response.py", line 577, in _json_body__set
    self.body = json.dumps(value, separators=(',', ':')).encode('UTF-8')
                ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/[email protected]/3.13.1/Frameworks/Python.framework/Versions/3.13/lib/python3.13/json/__init__.py", line 238, in dumps
    **kw).encode(obj)
          ~~~~~~^^^^^
  File "/opt/homebrew/Cellar/[email protected]/3.13.1/Frameworks/Python.framework/Versions/3.13/lib/python3.13/json/encoder.py", line 200, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/opt/homebrew/Cellar/[email protected]/3.13.1/Frameworks/Python.framework/Versions/3.13/lib/python3.13/json/encoder.py", line 261, in iterencode
    return _iterencode(o, 0)
  File "/opt/homebrew/Cellar/[email protected]/3.13.1/Frameworks/Python.framework/Versions/3.13/lib/python3.13/json/encoder.py", line 180, in default
    raise TypeError(f'Object of type {o.__class__.__name__} '
                    f'is not JSON serializable')
TypeError: Object of type bytes is not JSON serializable