Unable to update from 23.1 to 23.1.11

[Wibbling]

Hello,

I've installed opnsense and after setting it up and using it as a router for a while I thought to update it to the latest firmware.

When I attempt this the update dialog displays:
***GOT REQUEST TO CHECK FOR UPDATES***
Currently running OPNsense 23.1 at Wed Jul 19 22:39:29 BST 2023
Fetching changelog information, please wait... done
Updating OPNsense repository catalogue...
Fetching meta.conf: . done
pkg: https://pkg.opnsense.org/FreeBSD:13:amd64/23.1/latest/packagesite.pkg:
Host is down
pkg: https://pkg.opnsense.org/FreeBSD:13:amd64/23.1/latest/packagesite.txz:
Host is down
Unable to update repository OPNsense
Error updating repositories!
pkg: Repository OPNsense cannot be opened. 'pkg update' required
Checking integrity... done (0 conflicting)
Your packages are up to date.
***DONE***

I checked that the client could ping the URL specified and it can.

I can also ping from the shell of the opnsense router itself.

When I visit the URL I am able to download the files directly.

I can curl the files to the opnsense router directly.

I tried running the command pkg update, and that did appear to update packages (see screenshot).

On returning to the web UI, the above output persists.

I must e doing something wrong, or have missed a config option. I would be very grateful if folk would kindly advise where I have gone wrong so I can learn how to resolve the update failure.

Kind regards,

Wibs