I don’t know if it is related, but I got a new router a while back and was unable to access some sites/services (and only from Volumio players) including logs.volumio.org, while other sites/services worked fine. However, the access error for me was “connection refused”, so this may not be the same issue.
[SOLVED] Problems with new router
Later versions of Volumio worked fine for me, and did not require any changes, but perhaps the issue was fixed by a router firmware update.
Adrian.