No web acces after "pvecm e 1" command

[bluto]

Hi folks, I'm facing an issue with my 2 node cluster (earth and moon):

PVE version 4.0-50, no HA
NAS shared storage

If both nodes are online all works fine (VM/LXC creation, migration, backups, etc).
To test the cluster, I stopped one of them (e.g. earth node), this of course leads to loose the quorum:

root@moon:~# pvecm status
Quorum information
------------------
Date: Sat Nov 28 11:46:05 2015
Quorum provider: corosync_votequorum
Nodes: 1
Node ID: 0x00000002
Ring ID: 7140
Quorate: No

Votequorum information
----------------------
Expected votes: 2
Highest expected: 2
Total votes: 1
Quorum: 2 Activity blocked
Flags:

Membership information
----------------------
Nodeid Votes Name
0x00000002 1 192.168.0.3 (local)

So, to be able to perform operations on the remaining node, I set the quorum manually with the command:

# pvecm e 1

root@moon:~# pvecm status
Quorum information
------------------
Date: Sat Nov 28 12:17:19 2015
Quorum provider: corosync_votequorum
Nodes: 1
Node ID: 0x00000002
Ring ID: 7140
Quorate: Yes

Votequorum information
----------------------
Expected votes: 1
Highest expected: 1
Total votes: 1
Quorum: 1
Flags: Quorate

Membership information
----------------------
Nodeid Votes Name
0x00000002 1 192.168.0.3 (local)

but now I can't access to the web interface, the error is: "Login failed. Please try again."
The web interface becomes accessible again if the cluster returns to normal operation, i.e. after the node earth gets online.
Same behaviour if I stop moon node and run pvecm commands on earth node.

Any hint to solve this issue?

Thanks in advance
bluto