My browser was already set to "Don't enable HTTPS Only Mode".

Have not made any changes to the local browser settings, but now the site is fully accessible including the node list and document download pages.

All good!

On Wed, Jul 30, 2025, at 10:39 AM, Robert Armstrong wrote:
  FWIW, Firefox has a setting under "Privacy & Security" called "HTTPS Only Mode".  I quote -

  "... If HTTPS-Only Mode is enabled, then Firefox will upgrade all connections to HTTPS ..."

So try setting that to "Don't enable HTTPS Only Mode".

Bob