JSON unexpected mimetype error with dump1090 ver:0.4.3

[ThatKalle]

Error message aiohttp.client_exceptions.ContentTypeError: 200, message='Attempt to decode JSON with unexpected mimetype: ', url='http://127.0.0.1:8080/data/aircraft.json' when configuring adsbcot to query FEED_URL = http://127.0.0.1:8080/data/aircraft.json provided by dump1090.exe.

Using dump1090 on Windows

>dump1090.exe --version
dump1090 ver: 0.4.3 (Microsoft cl 19.40.33521, release, x64, MIMALLOC, GEN_ROUTES, NETPOLLER=select()).
Built on 7 Mar 2024.

"""ADS-B to TAK Gateway."""

__version__ = "8.0.2"