Phabricator/Arc issues

libphutil loaded from '/usr/local/share/libphutil/src'.
arcanist loaded from '/usr/local/share/arcanist/src'.
Config: Reading user configuration file "/home/mdhas/.arcrc"...
Config: Did not find system configuration at "/etc/arcconfig".
Working Copy: Unable to find .arcconfig in any of these locations: /home/mdhas/workspace/fm/.arcconfig.
Working Copy: Path "/home/mdhas/workspace/fm" is part of `git` working copy "/home/mdhas/workspace/fm".
Working Copy: Project root is at "/home/mdhas/workspace/fm".
Config: Reading local configuration file "/home/mdhas/workspace/fm/.git/arc/config"...
>>> [0] <conduit> user.whoami() <bytes = 117>
>>> [1] <http> http://phabricator/api/user.whoami
<<< [1] <http> 258,033 us
<<< [0] <conduit> 258,293 us

[2015-05-25 14:36:31] EXCEPTION: (ConduitClientException) ERR-INVALID-SESSION: Session key is not present. at [<phutil>/src/conduit/ConduitFuture.php:54]
arcanist(head=master, ref.master=b961869edac9), phutil(head=master, ref.master=ce3959b4046f)
  #0 ConduitFuture::didReceiveResult(array) called at [<phutil>/src/future/FutureProxy.php:60]
  #1 FutureProxy::getResult() called at [<phutil>/src/future/FutureProxy.php:37]
  #2 FutureProxy::resolve() called at [<phutil>/src/conduit/ConduitClient.php:57]
  #3 ConduitClient::callMethodSynchronous(string, array) called at [<arcanist>/src/workflow/ArcanistWorkflow.php:336]
  #4 ArcanistWorkflow::authenticateConduit() called at [<arcanist>/scripts/arcanist.php:340]