VirtualBox plugin errors

Failed to execute XPath query '/config/services/virtualbox'.
Failed to execute XPath query '/config/services/virtualbox'.
Failed to execute XPath query '/config/services/virtualbox'.
Error #0:
OMV\Config\DatabaseException: Failed to execute XPath query '/config/services/virtualbox'. in /usr/share/php/openmediavault/config/database.inc:78
Stack trace:
#0 /usr/share/openmediavault/engined/module/virtualbox.inc(73): OMV\Config\Database->get('conf.service.vi...')
#1 /usr/share/openmediavault/engined/rpc/services.inc(56): OMV\Engined\Module\VirtualBox->getStatus()
#2 [internal function]: OMVRpcServiceServices->getStatus(Array, Array)
#3 /usr/share/php/openmediavault/rpc/serviceabstract.inc(123): call_user_func_array(Array, Array)
#4 /usr/share/php/openmediavault/rpc/rpc.inc(86): OMV\Rpc\ServiceAbstract->callMethod('getStatus', Array, Array)
#5 /usr/sbin/omv-engined(536): OMV\Rpc\Rpc::call('Services', 'getStatus', Array, Array, 1)
#6 {main}

WARNING: The character device /dev/vboxdrv does not exist.
	 Please install the virtualbox-dkms package and the appropriate
	 headers, most likely linux-headers-amd64.


	 You will not be able to start VMs until this problem is fixed.
VirtualBox Extension Pack Personal Use and Evaluation License (PUEL)
<user agreement>


to the VBoxManage command line.


0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
Successfully installed "Oracle VM VirtualBox Extension Pack".
Processing triggers for php7.0-fpm (7.0.30-0+deb9u1) ...
Processing triggers for openmediavault (4.1.10) ...
Restarting engine daemon ...
Setting up libcrypt-passwdmd5-perl (1.3-10) ...
Setting up php7.0-soap (7.0.30-0+deb9u1) ...


Creating config file /etc/php/7.0/mods-available/soap.ini with new version
Setting up libbytes-random-secure-perl (0.28-1) ...
Setting up makepasswd (1.10-10) ...
Setting up openmediavault-virtualbox (4.1) ...


>>> *************** Error ***************
Bad Gateway
<<< *************************************
vbox:x:1000:1001::/home/vbox:
chown: cannot access '/etc/default/openmediavault-virtualbox': No such file or directory
dpkg: error processing package openmediavault-virtualbox (--configure):
 subprocess installed post-installation script returned error exit status 1
Processing triggers for php7.0-fpm (7.0.30-0+deb9u1) ...
Processing triggers for openmediavault (4.1.10) ...
Restarting engine daemon ...
Errors were encountered while processing:
 openmediavault-virtualbox


>>> *************** Error ***************


<<< *************************************


>>> *************** Error ***************