DRAFT KB-XXXX Sites showing 403 errors for some users after upgrade

Users are testing and seeing their test accounts are no longer able to access certain sites, even when users can see the sites in the navigation menu.

Symptoms

Users get a 403 Access Denied error when accessing the site

The application server log shows the following error:

Caused by: com.appiancorp.core.expr.exceptions.ExpressionRuntimeException$AppianExceptionProvider: Expression evaluation error [evaluation ID = XXXXXX] : 
The Site [name=“XXX”] does not exist, has been deleted, or you do not have sufficient privileges to access its data. (APNX-1-4198-000)

Cause

This issue has been reported to the Appian Product Team. The reference number for this issue is AN-140947.

Action

Select affected site on Appian Designer
Click Security
Save changes
Do not make actual changes to the site security, other than re-saving original security permissions

Affected Versions

This article applies to all versions of Appian after an upgrade.