Problem connecting via local socket

I've installed webvirtcloud onto a machine as per the instructions in the readme. The machine already has a few KVM machines set up, so I'm able to run something like this without issue:

$ virsh list

Id    Name                           State
----------------------------------------------------
 2     Some VM                     running

However, after adding a local socket entry on the computes tab of webvirtcloud, I get the following on the instances tab:

Error: Failed to connect socket to '/var/run/libvirt/libvirt-sock': Permission denied

I've tried adding both my local and the www-data user accounts to the libvirtd group but I still get the same error.

Any ideas?

[retspen]

$ sudo adduser www-data kvm

Thanks. Tried that but still getting the same error message.

I'm able to use TCP at the moment, so this isn't a huge deal. Would still be nice to solve though.

[retspen]

After that need restart service nginx

sudo service nginx restart

Refreshed the page but still getting the same error, even after clearing the cache.

[retspen]

Can you add libvirtd group to www-data and then restart service nginx?

sudo adduser www-data libvirtd
sudo service nginx restart

No change unfortunately

[retspen]

Can you reboot your server? Now I tested the Issue and my configuration work perfectly.

Not able to right now but will give it a try later on and report back. Thanks for the help :)

Apologies for the delay @retspen.

I rebooted as you suggested and it started working. Not quite sure what was wrong, but since things are working now I'll close this up.