Move Selected button in Virtual Domains no longer working. Just spins and spins.

A few days I go I went to move a site, it started OK but didnt output anything to the screen and just hung. The site didnt move.

Now when I go to Move Selected, it doesnt do anything, just spins and spins.

Error is:

Failed to update Virtualmin domains : Failed to lock file /etc/webmin/servers/1408058862281240.serv after 5 minutes. Last error was :

(but doesnt show an error)

I deleted /etc/webmin/servers/1408058862281240.serv.lock and I could get to the settings screen where I select which servers etc. So initiated the move again, but the first problem happened again where it did not output anything to the screen and just hung with spinning icon.