CORS Error when POST form to Google Spreadsheets

Hello. I created a simple Javascript/HTML form and i want to submit the data to a Google Spreadsheet, link, but I am getting CORS error. I am not sure if I need to add some codes on my end or its something on Google App Script or some configuration.

The steps I did for the Google part is create spreadsheet > App Script > enter codes > Run > allowed permissions > Deployed, following this guide

I am not familiar with web app development especially this sort of stuff. Any help would be great.

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