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DRAFT KB-XXXX - Cannot view or navigate to sites on iOS mobile app

Symptoms

When using the iOS Appian mobile application:

  • Users who have a site as their start page see the following error:
    The site does not exist, or you do not have sufficient privileges to access it.
    .
  • Users who have Tempo as their start page cannot see other site options when using the left navigation bar. However, these site options are visible on desktop and mobile browsers.

  • The following error is seen in tomcat-stdOut.log when the user signs in:

    com.appiancorp.core.expr.exceptions.ExpressionRuntimeException$AppianExceptionWithRootCauseProvider: Expression evaluation error: Error is in the title expression for page with web address identifier *****

Cause

This occurs due to an expression evaluation error in the Title field of a site page, causing the mobile bootstrap call to fail to present all sites. Note that expression evaluation errors within a Site object can fail silently, which can cause them to be missed during development. The error in tomcat-stdOut.log will specify what is causing the evaluation to fail (e.g. Could not find variable 'local!hello')

This issue has been reported to the Appian Product Team with reference number AN-128510.

Action

Locate the affected Site page by manually searching for the web address identifier (denoted by ***** in the error above) in all Site objects. For example, if the web address identifier in the logs is admin, look for a Site object that has a Page with Web Address Identifier of admin. Edit the Title expression of this Page based on the issue specified in the logs.  

example_of_site

Affected Versions

This article applies to all versions of Appian.

Last Reviewed: August 2020