Warning: “Missing a QAPage markup item on page to which this item should be associated.”

Hello, I am using anspress on my website. i have checked the google structured markup test:
https://search.google.com/structured-data/testing-tool/u/0/#url=https%3A%2F%2Fvpn-anbieter-vergleich-test.de%2Fhilfe%2Ffragen%2Fkann-ich-vpn-auch-auf-einer-vavoo-streambox-nutzen%2F
Warning on ‘Question’ type: “Missing a QAPage markup item on page to which this item should be associated.”
How could associate it? Could you help me?