Please follow the below steps:
1. It may be an error with your network. We recommend you change the network and try again.
2. Your phone storage space may be insufficient. Please uninstall and delete any unused software or files and clear the data cache to create more space.
3. It may be that Google Play has blocked it. We recommend you download it through other platforms.
If you're still unable to solve the issue, we recommend you back up your phone data (contact, text message, etc.) and reset to factory settings and try again.
If the issue persists, contact the Nothing Support Team for further assistance.