Take a look at your IVSU screen or run the APIM Utility and post the results. See if the installation finished properly. It sounds like the voice file installation might have had an issue. Maps seem ok. I found several instances of this issue on the Ranger5G forum.
Follow the instructions and run this utility and we can see if everything installed correctly…
Tutorial: APIM Interrogator Utility - Ford / Guides & Info - CyanLabs Official Community