Site URL: https://www.fringeartsbath.co.uk/
I have successfully embedded one external website into my Sqspace site, but it hasn't worked with the second external website I wish to embed.
The successful one is here: https://www.fringeartsbath.co.uk/phantom (embedded from Artsteps)
The unsuccessful one should be here: https://www.fringeartsbath.co.uk/outside (embedding from a custom site)
I used exactly the same process for both. They both show up while I am logged in & editing the pages.
I have tried disabling ajax, with no success - Sqspace live chat couldn't help and advised me to consult the forum.