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This is likely because Tableau has Clickjacking Protection enabled. You need to enable the Embed function on the Macro:
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Collecting Logs
Go to <YOUR CONFLUENCE URL>/admin/viewlog4j.action
Add com.schubergphilis with DEBUG logging to the configuration
Reproduce the issue you were having
Provide us with a support zip as outlined at https://confluence.atlassian.com/support/create-a-support-zip-790796819.html
If you are using Confluence Data Center, we need a copy of the logs from all of the nodes in your cluster.