1. Known Issues for Oracle Visual Builder Studio
  2. Known Issues
  3. App extension page preview isn't displayed in the Designer

App extension page preview isn't displayed in the Designer

When working on an app extension, you might see a "Page cannot be previewed" message in the Designer if your browser is blocking access to your Oracle Cloud Application instance. To configure your browser to allow access:

  1. Configure the browser's cookies options in chrome://settings/cookies to "Allow all cookies" and specify "Sites that can always use cookies".
  2. Disable the browser's "SameSite by default cookies" flag by adding --disable-features=SameSiteByDefaultCookies to the browser's startup parameters.

    If you're using Chrome 90 or older, you can disable the "SameSite by default cookies" flag in the browser's Flag options page (chrome://flags).

For more details on setting the browser options, see Resolving the error “Page cannot be previewed” in Extending Oracle Cloud Applications with Visual Builder Studio.