When you show a web page it’s embedded within an html iframe. The web page owner can control who can and can’t embed it using two common methods. First is the x-frame options http response header and the second is the content security policy frame ancestors directive.
If you own the web page follow these articles from Mozilla to whitelist
If you don't own the web page contact the owner of the web page and request that the iframe restriction be removed. Alternatively you can request that
*.risevision.com be added to their web page’s whitelist for embedding.