Go Read requires a working Text To Speech (TTS) engine and a TTS voice installed. Most, but not all, Android devices will have a default TTS engine. You will need to download a TTS voice if one is not already installed. There are additional TTS engines and voices available in the Play Store for free or for a price.
For devices running Android versions earlier than 4.0, under Settings, choose Voice input & output settings. Then choose Text-to-speech settings to confirm you have a working TTS by tapping Listen to an example.
For devices running Androi 4.0 or newer, choose Language & input under System Settings. Then tap Text-to-speech output and scroll down and tap Listen to an example to confirm your TTS is working.