adb shell error: device not found

[dinamic]

can't connect to ubuntu emulator ( devel-proposed channel )

adb shell
error: device not found

Ubuntu version 20150206
Device version 20150129
Image version 93

Log
File "/usr/bin/phablet-config", line 420, in main() File "/usr/bin/phablet-config", line 417, in main args.func(adb, args) File "/usr/bin/phablet-config", line 260, in _handle_welcome_wizard enabled = adb.shell('ls %s' % ran_file).strip() != ran_file File "/usr/lib/python2.7/dist-packages/phabletutils/device.py", line 144, in shell output = check_output(self._cmd % cmd) File "/usr/lib/python2.7/dist-packages/phabletutils/device.py", line 30, in check_output return subprocess.check_output(args, shell=True) File "/usr/lib/python2.7/subprocess.py", line 573, in check_output raise CalledProcessError(retcode, cmd, output=output) subprocess.CalledProcessError: Command 'adb -s emulator-5554 shell ls /home/phablet/.config/ubuntu-system-settings/wizard-has-run' returned non-zero exit status 255
emulator-5554

[dinamic (dinamic6661)]

i am not sure if this is the right place to post this bug :/
welp?