This article explains how to troubleshoot the issue with Polls for Confluence app after the upgrade/migration of the Confluence.
\uD83D\uDCD8 Instructions
Follow the below steps:
Navigate to the Confluence server installed location at this path
<confluencePath>/atlassian-confluence-7.19.18/confluence/WEB-INF/classes/velocity.properties
Modify the file
velocity.properties
Go to
introspector.allowlist.classes
and add the following line to the existing values in the new linecom.opensymphony.xwork.util.XWorkList
so if you add to the existing one, it will be as below
java.io.ObjectInputValidation,\ com.opensymphony.xwork.util.XWorkList,\ net.sf.hibernate.proxy.HibernateProxy
Stop and start the server.
This workaround is required only for 7.x versions, not 8.x versions.