Running FligtAware/PiAware latest version and Tonight this is showing up in the log and the MLAT symbol is red:
[2023-03-20 21:17 GMT] multilateration data no longer required, disabling mlat client
[2023-03-20 21:17 GMT] my feeder ID is d039d5f2-3acc-4290-9b99-07285053e2db
[2023-03-20 21:17 GMT] multilateration data requested
[2023-03-20 21:17 GMT] no ADS-B data program is serving on port 30005, not starting multilateration client yet
[2023-03-20 21:17 GMT] no ADS-B data program seen listening on port 30005 for 4 seconds, next check in 60s