android - Sinch Client down? Getting unable to resolve host -

after setting sinch instant messaging on app , testing it, worked good. when try use get: 04-10 00:08:16.175 12082-12103/com.yupo.dominic.yupo e/sinch-android-rtc﹕ error(code: 1002, domain: network, message: unknownhostexception: unable resolve host "sandbox.sinch.com": no address associated hostname). i'm assuming on sinch's side client working fine yesterday.

can if error on side?

have searched online cannot find information regarding it.

this problem internet connection. either offline or flaky internet connection.