Cloner - "The page isn't redirecting properly"

Cloner has been working extremely well, but I just logged on to try and clone a site (it doesn't matter which one - the same thing happens no matter which site I attempt to clone) and I consistently get a "The page isn't redirecting properly" in Firefox.

I've tried disabling plugins but the error remains.

Nothing has changed, except an update of the theme (Divi) and a few plugins.

I have not edited the HTACCESS file recently.

Any help would be appreciated.