ZENTYAL 2.2 cant connect to dash board

[aspangilinan]

hi to all,

please help me this error.
how to fix. thanks.       

 connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
2017/04/03 00:07:54 ERROR> PgDBEngine.pm:140 EBox::PgDBEngine::_disconnect - There wasn't a database connection, check if database exists\n
2017/04/03 00:07:54 ERROR> PgDBEngine.pm:119 EBox::PgDBEngine::_connect - Connection DB Error: could not connect to server: No such file or directory
        Is the server running locally and accepting
        connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
2017/04/03 00:07:54 ERROR> PgDBEngine.pm:140 EBox::PgDBEngine::_disconnect - There wasn't a database connection, check if database exists\n
2017/04/03 00:07:55 ERROR> PgDBEngine.pm:119 EBox::PgDBEngine::_connect - Connection DB Error: could not connect to server: No such file or directory
        Is the server running locally and accepting
        connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
2017/04/03 00:07:55 ERROR> PgDBEngine.pm:140 EBox::PgDBEngine::_disconnect - There wasn't a database connection, check if database exists\n