> For the complete documentation index, see [llms.txt](https://mobidonia.gitbook.io/react-app-builder/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mobidonia.gitbook.io/react-app-builder/common-problems.md).

# Common Problems

- [Can't log in, stays on the login screen](https://mobidonia.gitbook.io/react-app-builder/common-problems/cant-login-stays-on-login-screen.md)
- [Error shows: You don't have Item Purchase](https://mobidonia.gitbook.io/react-app-builder/common-problems/error-shows-you-dont-have-item-purchase.md): You don't have Item Purchase Code or your Item Purchase Code is not valid.Please update your Item Purchase Code.
- [Stuck on App Prioducer](https://mobidonia.gitbook.io/react-app-builder/common-problems/stuck-on-app-prioducer.md)