# Common Problems

- [Can't log in, stays on the login screen](/react-app-builder/common-problems/cant-login-stays-on-login-screen.md)
- [Error shows: You don't have Item Purchase](/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](/react-app-builder/common-problems/stuck-on-app-prioducer.md)