TypeError: Object of type bytes is not JSON serializable - DownloadsEndpoint

[xoriole]

Encountered when running application tester on main branch from source.

Traceback (most recent call last):
  File "/home/user/tribler/src/tribler/core/components/restapi/rest/rest_manager.py", line 53, in error_middleware
    response = await handler(request)
  File "/home/user/tribler/venv/<discount>/python3.10/site-packages/aiohttp/web_middlewares.py", line 117, in impl
    return await handler(request)
  File "/home/user/tribler/src/tribler/core/components/libtorrent/restapi/downloads_endpoint.py", line 379, in get_downloads
    return RESTResponse({"downloads": downloads_json, "checkpoints": checkpoints})
  File "/home/user/tribler/src/tribler/core/components/restapi/rest/rest_endpoint.py", line 66, in __init__
    body = json.dumps(body)
  File "/usr/<discount>/python3.10/json/__init__.py", line 231, in dumps
    return _default_encoder.encode(obj)
  File "/usr/<discount>/python3.10/json/encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/usr/<discount>/python3.10/json/encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
  File "/usr/<discount>/python3.10/json/encoder.py", line 179, in default
    raise TypeError(f\'Object of type {o.__class__.__name__} \'
TypeError: Object of type bytes is not JSON serializable

Additional tags:

{
  'source': 'core',
  'tribler_stopped': False,
  'version': '7.14.0-GIT',
  'machine': 'x86_64',
  'os': 'Linux-6.5.0-14-generic-x86_64-with-glibc2.35',
  'platform': 'linux'
}