I'm having trouble setting facebook events.

I’m in charge of the marketing campaign of one of my clients and to do that I need to set up the events (code snippets) to monitor the traffic in the website.
I used corvid to set them but only two of them are working correctly and I did nothing different with the other ones.
Anyone can tell me how to set them correctly?

Have you read these pages.
https://www.wix.com/corvid/forum/corvid-tips-and-updates/send-events-to-3rd-party-analytics-apps
https://www.wix.com/corvid/forum/community-discussion/facebook-pixel-event-firing-on-button-link-click
https://support.wix.com/en/article/about-tracking-tools-analytics
https://support.wix.com/en/article/corvid-tutorial-sending-tracking-and-analytics-events
https://www.wix.com/corvid/forum/community-discussion/tracking-lead-events-with-facebook-pixel

Read here for info about the trackEvent api reference.
https://www.wix.com/corvid/reference/wix-window.html#trackEvent

Finally, remember that your site must be published in order to use this feature.