访问连接失败

即时通访问连接失败！现在是什么问题？

object(stdClass)#11 (5) { ["error"] => string(21) "auth_bad_access_token" ["timestamp"] => int(1511687875308) ["duration"] => int(0) ["exception"] => string(53) "org.apache.usergrid.rest.exceptions.SecurityException" ["error_description"] => string(50) "Unable to authenticate due to corrupt access token" }