Want to create a quiz from database of 30 questions with answers as Radio buttons (1 to 5 scale)

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I am Dynamically adding radio buttons for each question using repeater from collection is creating problems while deployment as when I try to read radio button value (based on event context) I get error.
Worst thing is that everything works in sandbox, as soon as I deploy live I get error on browser, which occurs when I try to capture value.
I want to capture each event on the radio buttons by the user.

Any help will be appreciated, either correcting this method or suggest a new method all-together.

$w(“#radioGroup1”).onChange((event) => {
const repeaterData = $w(“#listRepeater”).data; // getting all the questions i am populating for the quiz (Question has title and text)

	let $item = $w.at(event.context); 
	let answer= $item("#radioGroup1").value; // error occurs here 
	let itemId = event.context.itemId; 
	let itemData = repeaterData.find((item) => item._id === itemId); 
	let index = data.findIndex((item) => item._id === itemId); 
	let newdata = {"user_answer": answer, "time_of_answer" : Date.now()}; 
	//this newdata will go to database 
});