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How to troubleshoot This article explains how to resolve the issue encountered with the Polls for Confluence app after you upgrade/migration of the Confluence to migrate to Confluence version 7.19.18 and above versions of 7. x

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Follow the below steps:

1. Navigate to the Confluence server installed location at this path: <confluencePath>/atlassian-confluence-7.19.18/confluence/WEB-INF/classes/velocity.properties

2. Modify Do the following changes to the file velocity.properties

   1. Go to introspector.allowlist.classes

   and add the following line to the existing values in the new line

   1. .

   2. Add com.opensymphony.xwork.util.XWorkList

   so if you add

   1. to the existing

   one, it will be as below

   1. values on a new line.
      
      Example reference:

      Code Block

   1. java.io.ObjectInputValidation,\

   1. com.opensymphony.xwork.util.XWorkList,\

   1. net.sf.hibernate.proxy.HibernateProxy

3. Stop and start restart the server.