Pandemic Parents Club

I am attempting to use an iframe to embed material from a separate website or my UNA install. I am using a raw block for the iframe code but it will not save (hangs) if I use iframe tags in the html block.It saves just fine if I use non- iframe, embed, or object tags.What dependencies exist or what needs set/enabled in order to use iframes? I have an iframely api key set...🤷🏾‍♀️Thanks for any insights, everyone.This is a brand new, self-hosted UNA installation with core apps.