Getting error in React Js application - App Platform

Hi, I am new to DigitalOcean I created an reactjs app connecting to flask app on the same App Platform, when deployed and access the reatJS site

Uncaught Error: Module build failed (from ./node_modules/babel-loader/lib/index.js):
Error: [BABEL] /workspace/client/src/index.js: Cannot find module '@babel/plugin-proposal-private-property-in-object'
Require stack:
- /workspace/client/node_modules/babel-preset-react-app/create.js
- /workspace/client/node_modules/babel-preset-react-app/index.js
- /workspace/client/node_modules/@babel/core/lib/config/files/module-types.js
- /workspace/client/node_modules/@babel/core/lib/config/files/configuration.js
- /workspace/client/node_modules/@babel/core/lib/config/files/index.js
- /workspace/client/node_modules/@babel/core/lib/index.js
- /workspace/client/node_modules/@rollup/plugin-babel/dist/index.js
- /workspace/client/node_modules/workbox-build/build/lib/bundle.js
- /workspace/client/node_modules/workbox-webpack-plugin/build/generate-sw.js
- /workspace/client/node_modules/workbox-webpack-plugin/build/index.js
- /workspace/client/node_modules/react-scripts/config/webpack.config.js
- /workspace/client/node_modules/react-scripts/scripts/start.js (While processing: "/workspace/client/node_modules/babel-preset-react-app/index.js")
    at Module._resolveFilename (node:internal/modules/cjs/loader:1145:15)
    at Module._load (node:internal/modules/cjs/loader:986:27)
    at Module.require (node:internal/modules/cjs/loader:1233:19)
    at require (node:internal/modules/helpers:179:18)
    at module.exports (/workspace/client/node_modules/babel-preset-react-app/create.js:168:9)
    at module.exports (/workspace/client/node_modules/babel-preset-react-app/index.js:19:10)
    at async (/workspace/client/node_modules/@babel/core/lib/gensync-utils/async.js:35:33)
    at async (/workspace/client/node_modules/gensync/index.js:186:15)
    at /workspace/client/node_modules/gensync/index.js:216:13
    at Generator.next (<anonymous>)
    at /workspace/client/node_modules/@babel/core/lib/config/full.js:180:21
    at Generator.next (<anonymous>)
    at Function.<anonymous> (/workspace/client/node_modules/@babel/core/lib/gensync-utils/async.js:21:3)
    at Generator.next (<anonymous>)
    at step (/workspace/client/node_modules/gensync/index.js:269:25)
    at evaluateAsync (/workspace/client/node_modules/gensync/index.js:291:5)
    at Function.errback (/workspace/client/node_modules/gensync/index.js:113:7)
    at errback (/workspace/client/node_modules/@babel/core/lib/gensync-utils/async.js:65:18)
    at async (/workspace/client/node_modules/gensync/index.js:188:17)
    at onFirstPause (/workspace/client/node_modules/gensync/index.js:216:13)
    at Generator.next (<anonymous>)
    at cachedFunction (/workspace/client/node_modules/@babel/core/lib/config/caching.js:52:46)
    at cachedFunction.next (<anonymous>)
    at loadPresetDescriptor (/workspace/client/node_modules/@babel/core/lib/config/full.js:292:43)
    at loadPresetDescriptor.next (<anonymous>)
    at recursePresetDescriptors (/workspace/client/node_modules/@babel/core/lib/config/full.js:77:31)
    at recursePresetDescriptors.next (<anonymous>)
    at /workspace/client/node_modules/@babel/core/lib/config/full.js:156:21
    at Generator.next (<anonymous>)
    at loadFullConfig (/workspace/client/node_modules/@babel/core/lib/config/full.js:113:5)
    at loadFullConfig.next (<anonymous>)
    at transform (/workspace/client/node_modules/@babel/core/lib/transform.js:20:44)
    at transform.next (<anonymous>)
    at step (/workspace/client/node_modules/gensync/index.js:269:25)
    at evaluateAsync (/workspace/client/node_modules/gensync/index.js:291:5)
    at errback (/workspace/client/node_modules/gensync/index.js:113:7)
    at stopHiding - secret - don't use this - v1 (/workspace/client/node_modules/@babel/core/lib/errors/rewrite-stack-trace.js:47:12)
    at transform (/workspace/client/node_modules/@babel/core/lib/transform.js:39:72)
    at node:internal/util:431:7
    at new Promise (<anonymous>)
    at transform (node:internal/util:417:12)
    at /workspace/client/node_modules/babel-loader/lib/transform.js:15:22
    at Generator.next (<anonymous>)
    at asyncGeneratorStep (/workspace/client/node_modules/babel-loader/lib/transform.js:3:103)
    at _next (/workspace/client/node_modules/babel-loader/lib/transform.js:4:194)
    at /workspace/client/node_modules/babel-loader/lib/transform.js:4:364
    at new Promise (<anonymous>)
    at /workspace/client/node_modules/babel-loader/lib/transform.js:4:97
    at /workspace/client/node_modules/babel-loader/lib/transform.js:48:17
    at /workspace/client/node_modules/babel-loader/lib/cache.js:130:26
    at Module._resolveFilename (node:internal/modules/cjs/loader:1145:15)
    at Module._load (node:internal/modules/cjs/loader:986:27)
    at Module.require (node:internal/modules/cjs/loader:1233:19)
    at require (node:internal/modules/helpers:179:18)
    at module.exports (/workspace/client/node_modules/babel-preset-react-app/create.js:168:9)
    at module.exports (/workspace/client/node_modules/babel-preset-react-app/index.js:19:10)
    at async (/workspace/client/node_modules/@babel/core/lib/gensync-utils/async.js:35:33)
    at async (/workspace/client/node_modules/gensync/index.js:186:15)
    at /workspace/client/node_modules/gensync/index.js:216:13
    at Generator.next (<anonymous>)
    at /workspace/client/node_modules/@babel/core/lib/config/full.js:180:21
    at Generator.next (<anonymous>)
    at Function.<anonymous> (/workspace/client/node_modules/@babel/core/lib/gensync-utils/async.js:21:3)
    at Generator.next (<anonymous>)
    at step (/workspace/client/node_modules/gensync/index.js:269:25)
    at evaluateAsync (/workspace/client/node_modules/gensync/index.js:291:5)
    at Function.errback (/workspace/client/node_modules/gensync/index.js:113:7)
    at errback (/workspace/client/node_modules/@babel/core/lib/gensync-utils/async.js:65:18)
    at async (/workspace/client/node_modules/gensync/index.js:188:17)
    at onFirstPause (/workspace/client/node_modules/gensync/index.js:216:13)
    at Generator.next (<anonymous>)
    at cachedFunction (/workspace/client/node_modules/@babel/core/lib/config/caching.js:52:46)
    at cachedFunction.next (<anonymous>)
    at loadPresetDescriptor (/workspace/client/node_modules/@babel/core/lib/config/full.js:292:43)
    at loadPresetDescriptor.next (<anonymous>)
    at recursePresetDescriptors (/workspace/client/node_modules/@babel/core/lib/config/full.js:77:31)
    at recursePresetDescriptors.next (<anonymous>)
    at /workspace/client/node_modules/@babel/core/lib/config/full.js:156:21
    at Generator.next (<anonymous>)
    at loadFullConfig (/workspace/client/node_modules/@babel/core/lib/config/full.js:113:5)
    at loadFullConfig.next (<anonymous>)
    at transform (/workspace/client/node_modules/@babel/core/lib/transform.js:20:44)
    at transform.next (<anonymous>)
    at step (/workspace/client/node_modules/gensync/index.js:269:25)
    at evaluateAsync (/workspace/client/node_modules/gensync/index.js:291:5)
    at errback (/workspace/client/node_modules/gensync/index.js:113:7)
    at stopHiding - secret - don't use this - v1 (/workspace/client/node_modules/@babel/core/lib/errors/rewrite-stack-trace.js:47:12)
    at transform (/workspace/client/node_modules/@babel/core/lib/transform.js:39:72)
    at node:internal/util:431:7
    at new Promise (<anonymous>)
    at transform (node:internal/util:417:12)
    at /workspace/client/node_modules/babel-loader/lib/transform.js:15:22
    at Generator.next (<anonymous>)
    at asyncGeneratorStep (/workspace/client/node_modules/babel-loader/lib/transform.js:3:103)
    at _next (/workspace/client/node_modules/babel-loader/lib/transform.js:4:194)
    at /workspace/client/node_modules/babel-loader/lib/transform.js:4:364
    at new Promise (<anonymous>)
    at /workspace/client/node_modules/babel-loader/lib/transform.js:4:97
    at /workspace/client/node_modules/babel-loader/lib/transform.js:48:17
    at /workspace/client/node_modules/babel-loader/lib/cache.js:130:26
    at ./src/index.js (https://octopus-app-bguru.ondigitalocean.app/static/js/bundle.js:10:7)
    at options.factory (https://octopus-app-bguru.ondigitalocean.app/static/js/bundle.js:10476:31)
    at __webpack_require__ (https://octopus-app-bguru.ondigitalocean.app/static/js/bundle.js:9939:32)
    at https://octopus-app-bguru.ondigitalocean.app/static/js/bundle.js:11053:37
    at https://octopus-app-bguru.ondigitalocean.app/static/js/bundle.js:11055:12
./src/index.js @ bundle.js:10
options.factory @ react refresh:6
__webpack_require__ @ bootstrap:22
(anonymous) @ startup:7
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react refresh:6 WebSocket connection to 'wss://octopus-app-bguru.ondigitalocean.app:8080/ws' failed: 
WebSocketClient @ WebSocketClient.js:13
initSocket @ socket.js:27
./node_modules/webpack-dev-server/client/index.js?protocol=ws%3A&hostname=0.0.0.0&port=8080&pathname=%2Fws&logging=none&overlay=%7B%22errors%22%3Atrue%2C%22warnings%22%3Afalse%7D&reconnect=10&hot=true&live-reload=true @ index.js:320
options.factory @ react refresh:6
__webpack_require__ @ bootstrap:22
(anonymous) @ startup:5
(anonymous) @ startup:7
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WebSocketClient.js:13 WebSocket connection to 'wss://octopus-app-bguru.ondigitalocean.app:8080/ws' failed: 
WebSocketClient @ WebSocketClient.js:13
initSocket @ socket.js:27
(anonymous) @ socket.js:51
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WebSocketClient.js:13 WebSocket connection to 'wss://octopus-app-bguru.ondigitalocean.app:8080/ws' failed: 
WebSocketClient @ WebSocketClient.js:13
initSocket @ socket.js:27
(anonymous) @ socket.js:51
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WebSocketClient.js:13 WebSocket connection to 'wss://octopus-app-bguru.ondigitalocean.app:8080/ws' failed: 
WebSocketClient @ WebSocketClient.js:13
initSocket @ socket.js:27
(anonymous) @ socket.js:51
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