There is something wrong with the goals tracking in Yandex.Metrica

Read this article from Yandex Support: https://yandex.ru/support/metrika/reports/add-goals.html#check-goal

Yandex.Metrica may not track user activity when:

• Tracking tag is missing. If you think that a tracking tag has been installed, check if it was done correctly. If some content is displayed in an iframe, install a tracker code inside the iframe to activate the goals tracking process.
• Other scripts are blocking the tracker.
• Tracker is blocked by the extension Adblock Plus.
• A visitor left the website too soon, before the system could track his activities.