GUI login not possible - Failed to connect to socket: No such file or directory

Hi,

Just did an upgrade to OMV 3.x without any issues - at least not known issues. Everything! is working except of the login to the webGui.
GUI login ends up with the following error:

Failed to connect to socket: No such file or directory

The details are:

Error #0:
exception 'OMV\Rpc\Exception' with message 'Failed to connect to socket: No such file or directory' in /usr/share/php/openmediavault/rpc/rpc.inc:140
Stack trace:
#0 /var/www/openmediavault/rpc/session.inc(56): OMV\Rpc\Rpc::call('UserMgmt', 'authUser', Array, Array, 2, true)
#1 [internal function]: OMVRpcServiceSession->login(Array, Array)
#2 /usr/share/php/openmediavault/rpc/serviceabstract.inc(124): call_user_func_array(Array, Array)
#3 /usr/share/php/openmediavault/rpc/rpc.inc(86): OMV\Rpc\ServiceAbstract->callMethod('login', Array, Array)
#4 /usr/share/php/openmediavault/rpc/proxy/json.inc(95): OMV\Rpc\Rpc::call('Session', 'login', Array, Array, 3)
#5 /var/www/openmediavault/rpc.php(45): OMV\Rpc\Proxy\Json->handle()
#6 {main}

Can somebody help?

Regards,
Alex

Got it, didn't prepare the upgrade by uninstalling all plugins using the 2.x GUI. While removing the plugins via CLI I must have overlooked one old plugin. Removed the last one as well and am able to login now.
Sorry for that.

Best regards,
Alex