app/(default)/contact-us/content.js

@@ -2,6 +2,7 @@
 import React, { useRef, useState } from "react"
 import ReCAPTCHA from "react-google-recaptcha";
 import { toast } from "react-hot-toast";
+const { NEXT_PUBLIC_RECAPTCHA_SITE_KEY } = process.env;
 
 export default function ContactUsContent() {  
   const recaptchaRef = useRef(null);