Bot Composer won't start

Describe the bug

I’ve been using v2.1 with no issue, until my computer crashed with a blue screen yesterday. Now, the application won’t start. I tried uninstalling and reinstalling. I tried installing vcredist and rebooting as mentioned in https://github.com/microsoft/BotFramework-Composer/issues/7964

Version

2.1

Browser

• Electron distribution
• Chrome
• Safari
• Firefox
• Edge

OS

• macOS
• Windows
• Ubuntu

To Reproduce

Steps to reproduce the behavior:

1. Run v2.1 Bot Composer application

Expected behavior

Composer should start

Screenshots

Additional context

The error in the logs I got after running start set DEBUG=composer*:

(node:536) UnhandledPromiseRejectionWarning: SyntaxError: Unexpected token (node:536) UnhandledPromiseRejectionWarning: SyntaxError: Unexpected token (node:536) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:536) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:536) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:536) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

[tonyanziano]

Awesome! Glad to hear it. Going to close this issue now.

Also you can now delete those backups if you want.

[lshade]

That fixed it! Just renamed extensions.json to extensions_backup.json and started Composer. Thank you!