If Nokia Store client fails to start, try the following actions to recover:
- Reboot your phone.
- Reinstall Nokia Store client from SW Updates menu if an update is available for your phone.
- If the above actions don't help, try installing the Qt components v1.1 from Nokia Betalabs in your phone.
Note that the Nokia Store client version should be v3.30.14 or later (to check the version number, select My stuff > Support).