Iframe Panel Cannot Display Any External URL (Always Blank)

[erelemirhan_14]

I’m trying to use the iframe panel in EspoCRM, but no external URL is displayed — every link (including public sites like Google or my own dashboard test page) shows a blank screen. It looks like something (maybe X-Frame-Options or CSP) is blocking all external embedding. How can I allow external URLs to be displayed inside the iframe panel?

[victor]

It looks like in /data/config.php you should add your domain to iframeSandboxExcludeDomainList.

  'iframeSandboxExcludeDomainList' => [
    'google.com',
    'domain.com',
    'my.domain.com'
  ],

A similar topic was discussed here: https://forum.espocrm.com/forum/gene...lem-bug-or-not.