Running on windows 10, it looks like the captcha window opens a white screen for me.

Navigating to https://signalcaptchas.org/registration/generate.html shows a Recaptcha 3 box. However I don't see the Recaptcha 3 UI in the captcha window.

@josephdangerstewart you need to set the SIGNAL_ENABLE_HTTP environment variable to a truthy value. On Linux this looks like

SIGNAL_ENABLE_HTTP=1 yarn start

you need to set the SIGNAL_ENABLE_HTTP environment variable to a truthy value. On Linux this looks like

Oh whoops, looks like I missed that part in the contributing guidelines 😅 Thanks for pointing it out!

I have cherry-picked your changes onto the latest version of master. When I tried out on my Mac, I have infinite captcha check with no SMS received 😅

@elisedjn Did you remember to regenerate the assets before starting the app (by running yarn grunt)? If the problem persists, can you provide a debug log?

@kevinsung Sorry for my late answer.
Thanks for your help, it's working now! :)

Can confirm the CAPTCHA registration works, I was able to set up Signal as a standalone device on the staging servers 🎉 thanks!

Hello,
I am getting the same Error 402 with the newest Development Branch, even when using
SIGNAL_ENABLE_HTTP=1 yarn start

This is the Log:
INFO 2021-06-18T05:00:21.100Z checkExpiringMessages: found no messages to expire ERROR 2021-06-18T05:00:21.308Z Top-level unhandled promise rejection: Error: Username in storage was not a string. Cannot connect to WebAPI at Object.connectToServerWithStoredCredentials ([REDACTED]/ts/util/connectToServerWithStoredCredentials.js:9:15) at Object.refreshRemoteConfig ([REDACTED]/ts/RemoteConfig.js:26:59) at invokeFunc ([REDACTED]/node_modules/lodash/lodash.js:10401:23) at leadingEdge ([REDACTED]/node_modules/lodash/lodash.js:10411:26) at Object.debounced [as maybeRefreshRemoteConfig] ([REDACTED]/node_modules/lodash/lodash.js:10478:20) at Object.initRemoteConfig ([REDACTED]/ts/RemoteConfig.js:12:19) at [REDACTED]/ts/background.js:649:36 INFO 2021-06-18T05:00:21.393Z Updating BrowserWindow config: {"maximized":false,"autoHideMenuBar":false,"fullscreen":false,"width":844,"height":653,"x":412,"y":141} INFO 2021-06-18T05:00:21.393Z config/set: Saving ephemeral config to disk INFO 2021-06-18T05:00:22.288Z provisioning socket open ERROR 2021-06-18T05:00:26.671Z Top-level unhandled error: TypeError: Cannot read property 'toUpperCase' of undefined at child.validateNumber (file://[REDACTED]/js/views/phone-input-view.js:25:9) at HTMLDivElement.dispatch (file://[REDACTED]/js/components.js:5429:27) at HTMLDivElement.elemData.handle (file://[REDACTED]/js/components.js:5233:28) INFO 2021-06-18T05:00:30.736Z GET https://textsecure-service-staging.whispersystems.org/v1/accounts/sms/code/+[REDACTED]687 ERROR 2021-06-18T05:00:31.641Z GET https://textsecure-service-staging.whispersystems.org/v1/accounts/sms/code/+[REDACTED]687 402 Error INFO 2021-06-18T05:00:40.217Z Loaded this list of log files from logPath: app.log, app.log.1, main.log, main.log.1

So i tried checking out kevinsung/captcha with which i then run yarn grunt
When I run yarn grunt I get the following Error:

Running "exec:transpile" (exec) task
$ tsc
ts/LibSignalStores.ts(42,14): error TS2515: Non-abstract class 'Sessions' does not implement inherited abstract member 'getExistingSessions' from class 'SessionStore'.
ts/logging/set_up_renderer_logging.ts(70,9): error TS2322: Type 'Readonly | { level: LogLevel.Error; msg: string; time: string; }' is not assignable to type '{ level: LogLevel; msg: string; time: string; }'.
Type 'Readonly' is missing the following properties from type '{ level: LogLevel; msg: string; time: string; }': level, msg, time
ts/logging/shared.ts(30,48): error TS2339: Property 'bind' does not exist on type 'never'.
ts/services/senderCertificate.ts(91,5): error TS2322: Type 'unknown' is not assignable to type '{ expires?: number | undefined; serialized: ArrayBuffer; } | undefined'.
Type 'unknown' is not assignable to type '{ expires?: number | undefined; serialized: ArrayBuffer; }'.
ts/services/senderCertificate.ts(91,40): error TS2349: This expression is not callable.
Type 'never' has no call signatures.
ts/services/senderCertificate.ts(92,25): error TS2571: Object is of type 'unknown'.

error Command failed with exit code 2.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
Exited with code: 2.
Error executing child process: Error: Process exited with code 2.
Warning: Task "exec:transpile" failed. Use --force to continue.

Aborted due to warnings.
error Command failed with exit code 3.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Any Help Appreciated

@RagonEbker It's likely that this branch doesn't work anymore because I've let it fall so far behind the development branch. For now, I don't intend to update this PR unless the Signal developers express interest in reviewing it. If someone else would like to fix the conflicts and open a new PR to replace mine, I will gladly close this one.

I've created a draft PR at #5473 to resolve the merge conflicts in this PR.

As this is my first contribution, constructive feedback is warmly welcomed before I submit this PR for merge.

Thank you @sockbot ! Closing in favor of #5473 .