In ionic mobile application when run TextToSpeech.speak() working in web not working in android device

[jyothimarkal]

Hi,
In Ionic application when i run TextToSpeech.speak() working in web not working in android device,
and giving error in android
methodData: {"text":"This is a sample text.","lang":"en-US","rate":1,"pitch":1,"volume":1,"category":"ambient"}
I/Capacitor/Console: File: http://localhost/ - Line 218 - Msg: undefined

await TextToSpeech.speak({
text: "This is a sample text.",
lang: 'en-US',
rate: 1,
pitch: 1,
volume: 1,
category: 'ambient',
});

Plz help me.