# Hot Topic and Troubleshooting

- [Pixel issue](/facebook-multiple-pixel/hot-topic-and-troubleshooting/pixel-issue.md)
- [The importance of Conversion API](/facebook-multiple-pixel/hot-topic-and-troubleshooting/pixel-issue/the-importance-of-conversion-api.md)
- [Unable to get Access Token](/facebook-multiple-pixel/hot-topic-and-troubleshooting/pixel-issue/unable-to-get-access-token.md)
- [Duplicated Events Tracking](/facebook-multiple-pixel/hot-topic-and-troubleshooting/pixel-issue/duplicated-events-tracking.md)
- [Catalog issue](/facebook-multiple-pixel/hot-topic-and-troubleshooting/catalog-issue.md)
- [Catalog - Full Permission](/facebook-multiple-pixel/hot-topic-and-troubleshooting/catalog-issue/catalog-full-permission.md)