Check your connection and try reopening Chatbot. If needed, switch between Wi-Fi and mobile data to see whether the issue is tied to one network.
Install any available app update, then restart your device if the problem continues.
Note whether the app closes immediately or only when you open a particular feature.
Contact support with your device model, operating-system version, app version and the steps that cause the issue.
Do not start by deleting the app if you are unsure whether your existing content is linked to an account.