# Troubleshooting

- [Async Problem](https://docs.zipy.ai/troubleshooting/async-problem.md): Sessions not recording after adding the async attribute to the Zipy script tag.
- [Can't see user data in sessions](https://docs.zipy.ai/troubleshooting/cant-see-user-data-in-sessions.md): Why can't I see user email or other customer data inside Zipy?
- [Errors in npm](https://docs.zipy.ai/troubleshooting/errors-in-npm.md): Why is Zipy npm giving a build warning - ‘ReferenceError: window is not defined’ and how to resolve?
- [Network header missing in Zipy](https://docs.zipy.ai/troubleshooting/network-header-missing-in-zipy.md): Why can't I see all the network request headers in the Dev Tools section?
- [No network timing split available](https://docs.zipy.ai/troubleshooting/no-network-timing-split-available.md): Why can't I see timing split for my API calls in API performance or other pages?
- [No recordings or errors visible](https://docs.zipy.ai/troubleshooting/no-recordings-or-errors-visible.md): Why can't I see any sessions or errors within Zipy after integrating the SDK or npm in my application code?


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