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Users observe a blank screen when accessing Appian via Zscaler.
When accessing Sites, the tabs render fine but the content is not shown.
Some users observe a 403 - Access Denied error.
Appian application works as expected when Zscaler is disabled.
This can happen due to the mis-configuration in Zscaler settings.
This issue has been resolved in the past by adding the site URL to the SSL bypass list in Zscaler.
This article applies to all versions of Appian.
Last Reviewed: November 2018