Please check the following step
Turn on Bluetooth
Turn on Location service
iOS mobile phone, please check that you allow OneDee app get to your Location Service
Please connect the internet before connect to your organization in the first time.

If you do not allow when OneDee app. ask for permission getting to the phone in the first while install OneDee app, you will can not do time clock.

Please uninstall the app. and reinstall again.