Can't connect outside my local network

This is my first forray into HA and I’ve installed the system on a Wyse 5070 thin client. I can access the machine via the local network from my PC, but receive the following error message when I’ve started to add my first Add On’s:

Failed to to call /addons/core_mosquitto/install - ‘AddonManager.install’ blocked from execution, no host internet connection

The machine is plugged into the router and I can see it on the network, it doesn’t appear to be blocked, but just can’t solve the problem. Provider is Vodafone in the UK if anyone has any suggestions?

Thanks

Go to Settings → System → Network. Select your network adaptor and expand the IPv4 box. Set your DNS to 1.1.1.1 or 8.8.8.8 and see if that helps.

Thanks, gave it a go but error still remains that it has no internet connection. Annoying!!!

Perhaps you need to enable HA cloud service or similar

No that is not required.

Oddly I can access the Internet on the PC using a bootable system on a USB and browse the web. But it just won’t allow HA to access. Perplexing.