Ok so I decided to upgrade to v4, shutdown and created an image of my usb just in case, however once restarted to then begin the upgrade I receive the following;
Error #0:
exception 'Exception' with message 'Could not connect to host (http://127.0.0.1:18083/)' in /usr/share/phpvirtualbox/endpoints/lib/vboxconnector.php:220
Stack trace:
#0 /usr/share/openmediavault/engined/rpc/virtualbox.inc(136): vboxconnector->connect()
#1 [internal function]: OMV\Engined\Rpc\VirtualBox->getMachines(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('getMachines', Array, Array)
#4 /usr/sbin/omv-engined(536): OMV\Rpc\Rpc::call('VirtualBox', 'getMachines', Array, Array, 1)
#5 {main}
I have done some searching but to be honest I'm not sure where to start.....I have downloaded the virtual disk so in effect I could remove VB and just reinstall once the upgrade has completed, but I would also like to fix the error.