Mapbox Deploy error occurred while parsing the WebWorker bundle. due to improper transpilation Babel

In this video we published our project on real link. We deployed the server side to Heroku and the client side to Netlify as an automatic deployment from Github repository in two subfolders. And we solved many problems and errors: An error occurred while parsing the WebWorker bundle. This is most likely due to improper transpilation by Babel; please see https://docs.mapbox.com/mapbox-gl-js/guides/install/#transpiling f06ee142-18b0-4458-a518-2280732848b6:1 Treating warnings as errors because process.env.CI = true. Most CI servers set it automatically. Failed to compile. "build.command" failed Error message Command failed with exit code 1: npm run build (https://ntl.fyi/exit-code-1) Error location In Build command from Netlify app: npm run build Resolved config build: base: /opt/build/repo command: npm run build commandOrigin: ui environment: For the selected environment is no default script chunk format available: JSONP Array push can be chosen when 'document' or 'importScripts' is available. CommonJs exports can be chosen when 'require' or node builtins are available. Make sure that your 'browserslist' includes only platforms that support these features or select an appropriate 'target' to allow selecting a chunk format by default. Alternatively specify the 'output.chunkFormat' directly. We added CI=false in the environment variables on Netlify to bypass the warnings in React web app and complete the building process The whole videos playlist of the project: https://www.youtube.com/watch?v=ANZNMaBODDY&list=PLufbXXGswL_pS6rdWbDO56oiZovLWE_rs Source Code on github: https://github.com/codelikepro22/place-to-stay/tree/project-deploy The buildpack package we used on Heroku: https://github.com/timanovsky/subdir-heroku-buildpack 00:00 Introduction 00:12 Deploying backend to Heroku 06:08 Deploying frontend to Netlify 06:42 Solving warnings problem to allow built with warnings CI=false 9:00 Solving Mapbox deployment or building problem (bundling compiling error)