DRAFT KB-[SP-3014]"Unexpected token < in JSON at position 0" Error

Symptoms

Users that authenticate with SAML or with Native Authentication on a SAML enabled environment see the following error when navigating around Appian or interacting with an interface:

The error may also appear if one or more of the following apply:

• The session timeout in Appian and the session timeout in the Identify Provider have different values.
• Users are inactive in Appian for a prolonged period.
• Users log out of Appian in one tab while still having Appian open in a second tab. When navigating around the second tab, they see this error.

Cause

This issue has been hotfixed via AN-87093 in Appian versions X.X to X.X.

Action

Apply the latest hotfix to your Appian installation or upgrade to the latest version of Appian.

Workaround

Refreshing the page will resolve the error and redirect the user to the Login Page.

Affected Versions

This article applies to all versions of Appian.

Last Reviewed: July 2020