After successfully deploying it gave me a blank index page.
Any idea what could be the issue?
thank you

on running npm run deploy after all other steps are completed for installation:

$ twilio-phone-client-main % npm run deploy

[email protected] deploy /Users/noaman_sarguroh/Desktop/twilio-phone-client-main
react-scripts build && rm -rf deploy/assets/ && mkdir deploy/assets/ && cp -r build/* deploy/assets/ && cd deploy && TWILIO_SERVERLESS_API_CONCURRENCY=1 twilio serverless:deploy

Creating an optimized production build...
Compiled successfully.

File sizes after gzip:

252.45 KB build/static/js/2.834e44f4.chunk.js
18.13 KB build/static/js/main.00cfe3ac.chunk.js
779 B build/static/js/runtime-main.a44a3e6c.js
398 B build/static/css/main.6fd2da93.chunk.css

The project was built assuming it is hosted at /.
You can control this with the homepage field in your package.json.

The build folder is ready to be deployed.
You may serve it with a static server:

npm install -g serve
serve -s build

Find out more about deployment here:

bit.ly/CRA-deploy

Deploying functions & assets to the Twilio Runtime

Account AC*****************************
Token IkCG****************************
Service Name twilio-phone-client
Environment dev
Root Directory /Users/noaman_sarguroh/Desktop/twilio-phone-client-main/deploy
Dependencies twilio
Env Variables API_KEY, API_SECRET, CHAT_SERVICE_SID, TWILIO_NUMBER, TWIML_APP_SID, SECRET, TWILIO_ACCOUNT_SID, TWILIO_AUTH_TOKEN
Runtime undefined

✖ Failed Deployment

│ ERROR Failed API Request 20003
│
│ Authenticate
│
│ More info: https://www.twilio.com/docs/errors/20003

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] deploy: react-scripts build && rm -rf deploy/assets/ && mkdir deploy/assets/ && cp -r build/* deploy/assets/ && cd deploy && TWILIO_SERVERLESS_API_CONCURRENCY=1 twilio serverless:deploy
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] deploy script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /Users/noaman_sarguroh/.npm/_logs/2021-05-07T08_51_29_636Z-debug.log

The full logs is as follows:
/Users/noaman_sarguroh/.npm/_logs/2021-05-07T08_51_29_636Z-debug.log:
0 info it worked if it ends with ok
1 verbose cli [ '/usr/local/bin/node', '/usr/local/bin/npm', 'run', 'deploy' ]
2 info using [email protected]
3 info using [email protected]
4 verbose run-script [ 'predeploy', 'deploy', 'postdeploy' ]
5 info lifecycle [email protected]predeploy: [email protected]
6 info lifecycle [email protected]deploy: [email protected]
7 verbose lifecycle [email protected]deploy: unsafe-perm in lifecycle true
8 verbose lifecycle [email protected]deploy: PATH: /usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/node-gyp-bin:/Users/noaman_sarguroh/Desktop/twilio-phone-client-main/node_modules/.bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/Apple/usr/bin
9 verbose lifecycle [email protected]deploy: CWD: /Users/noaman_sarguroh/Desktop/twilio-phone-client-main
10 silly lifecycle [email protected]deploy: Args: [
10 silly lifecycle '-c',
10 silly lifecycle 'react-scripts build && rm -rf deploy/assets/ && mkdir deploy/assets/ && cp -r build/* deploy/assets/ && cd deploy && TWILIO_SERVERLESS_API_CONCURRENCY=1 twilio serverless:deploy'
10 silly lifecycle ]
11 silly lifecycle [email protected]deploy: Returned: code: 1 signal: null
12 info lifecycle [email protected]deploy: Failed to exec deploy script
13 verbose stack Error: [email protected] deploy: react-scripts build && rm -rf deploy/assets/ && mkdir deploy/assets/ && cp -r build/* deploy/assets/ && cd deploy && TWILIO_SERVERLESS_API_CONCURRENCY=1 twilio serverless:deploy
13 verbose stack Exit status 1
13 verbose stack at EventEmitter. (/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/index.js:332:16)
13 verbose stack at EventEmitter.emit (events.js:315:20)
13 verbose stack at ChildProcess. (/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/lib/spawn.js:55:14)
13 verbose stack at ChildProcess.emit (events.js:315:20)
13 verbose stack at maybeClose (internal/child_process.js:1048:16)
13 verbose stack at Process.ChildProcess._handle.onexit (internal/child_process.js:288:5)
14 verbose pkgid [email protected]
15 verbose cwd /Users/noaman_sarguroh/Desktop/twilio-phone-client-main
16 verbose Darwin 19.5.0
17 verbose argv "/usr/local/bin/node" "/usr/local/bin/npm" "run" "deploy"
18 verbose node v14.16.1
19 verbose npm v6.14.12
20 error code ELIFECYCLE
21 error errno 1
22 error [email protected] deploy: react-scripts build && rm -rf deploy/assets/ && mkdir deploy/assets/ && cp -r build/* deploy/assets/ && cd deploy && TWILIO_SERVERLESS_API_CONCURRENCY=1 twilio serverless:deploy
22 error Exit status 1
23 error Failed at the [email protected] deploy script.
23 error This is probably not a problem with npm. There is likely additional logging output above.
24 verbose exit [ 1, true ]

Hello everyone, I followed the installation process line by line. After the last deploy, i went to this link right: https://twilio-phone-client-xxxx-dev.twil.io/index.html ? Do I have to do anything else?
I run npm deploy. then go to the above link, it says 'Not Found' with white background. Please help. Thank you!

Does this support MMS? If I send a MMS message to client, it comes as blank