[tor-relays] Relay is down

Hi,

My relay was up during 4 days, but now it's down. In the log it says:

Dec 30 21:19:51.000 [warn] http status 400 ("Authdir is rejecting routers in this range.") response from dirserver '128.31.0.39:9131'. Please$ Dec 30 21:19:51.000 [warn] http status 400 ("Authdir is rejecting routers in this range.") response from dirserver '208.83.223.34:443'. Pleas$ Dec 30 21:19:51.000 [warn] http status 400 ("Authdir is rejecting routers in this range.") response from dirserver '131.188.40.189:80'. Pleas$ Dec 30 21:19:51.000 [warn] http status 400 ("Authdir is rejecting routers in this range.") response from dirserver '86.59.21.38:80'. Please c$

What could be happening? I restart it but it says the same on the log.

Regards, Gio