Bug in Statistiscs at Ushahidi 2.7.3


Since a month I started receiving this message:
application/models/stats.php [535]:
Unknown Exception: Error number: 6
Error message: Couldn’t resolve host ‘tracker.ushahidi.com
Relate esse problema ao Ushahidi
Carregado em 0.2526 segundos, usando 5.67MB de memória. Gerado pelo Ushahidi v2.7.3. "

Does any good soul could help me to solve it? I am dealing with tough problems and it I will be gratefull for a useful advise.!