In Model page,
public function rules()
{
$rules = [
[[self::SMS_ACCOUNT_ID, self::SMS_AUTH_TOKEN, self::SMS_SENDER_ID,self::SMS_COUNTRY_CODE, self::MOBILE_COUNTRY_CODE], 'required'],
];
}
Sorry not related to this extension. Seems some coding issue at your end. Please use this repo to report only bugs/enhancements related to this extension.
In Model page, public function rules() { $rules = [ [[self::SMS_ACCOUNT_ID, self::SMS_AUTH_TOKEN, self::SMS_SENDER_ID,self::SMS_COUNTRY_CODE, self::MOBILE_COUNTRY_CODE], 'required'], ]; }
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