A further comment: I tried looking for an update as mentioned by [Sonomascanner] , but couldn’t see it.
I reinstalled gl-cloud-ui (3.0.13-1)and gl-ddns (3.0.18-1) these are earlier versions than before. I am not sure why?

With this set up I turn DDNS on (switch goes green). If I then click on ‘Plug-ins’ and then back to ‘Remote Access’ the DDNS seems to have been switched OFF (Not green but grey) This seems unreasonable.