If you are using an Android device, check the following settings and change them if necessary. This will solve the problem in most cases.
1- Make sure that all developer options on your mobile phone are switched off, including the USB error reporting. You can adjust this option in 'Developer options' in 'Settings'.
2- Make sure that your device is not 'rooted'. If the operating system is an Android variant (also called a 'custom ROM'), such as LineageOS or Pixel Experience, then the wero app can’t be installed for security reasons.
3- If you’re using iOS, your device must not be 'jailbroken'. If the problem continues, you are probably using an unknown device or a very recent model that is not yet configured in our app server.
If this happens, contact Wero support via the app’s settings and provide us with information about the manufacturer, model, and version of your device's operating system.