Thanks Trurl, I changed the IP address according to the Wikipedia page and my shares have reconnected.
My DuckDNS docker is able to connect to the internet, but the installation of the Community Applications still hangs just like before, even after a reboot!
I have attached the latest diagnostics below in case you get the chance to take a look.
Thanks for your help.
cloalserver-diagnostics-20210717-1723.zip