bug report: teamsAppExtendToM365.IJe

[poojakaji]

An unexpected error has occurred while performing the teamsAppExtendToM365 task. {"stack":"TypeError: Cannot read properties of undefined (reading 'endsWith')\n\tat t.loginWithBrowser (<REDACTED: user-file-path>/extension.js:2254:83790)\n\tat async t.login (<REDACTED: user-file-path>/extension.js:2254:81424)\n\tat async t.getToken (<REDACTED: user-file-path>/extension.js:2254:87713)\n\tat async t.getTokenByScopes (<REDACTED: user-file-path>/extension.js:2254:86910)\n\tat async t.signInWhenNoAccountInCache (<REDACTED: user-file-path>/extension.js:2254:92102)\n\tat async t.getAccessToken (<REDACTED: user-file-path>/extension.js:2254:91191)\n\tat async Jtt.handler (<REDACTED: user-file-path>/extension.js:773:2148)\n\tat async /Users/poojakaji/.vscode/extensions/teamsdevapp.ms-teams-vscode-extension-6.6.1/out/src/extension.js:773:1717\n\tat async $So (<REDACTED: user-file-path>/extension.js:209:60633)\n\tat async Jtt.execute (<REDACTED: user-file-path>/extension.js:773:1680)\n\tat async Jtt. (<REDACTED: user-file-path>/extension.js:711:25969)\n\tat async t.executeImpl (<REDACTED: user-file-path>/extension.js:745:4893)\n\tat async t.execute (<REDACTED: user-file-path>/extension.js:745:2615)\n\tat async PZ.provision (<REDACTED: user-file-path>/extension.js:917:14148)\n\tat async PZ. (<REDACTED: user-file-path>/extension.js:20:15321)\n\tat async uo.provisionResourcesOnce (<REDACTED: user-file-path>/extension.js:1036:21314)\n\tat async uo._2c (<REDACTED: user-file-path>/extension.js:998:27318)\n\tat async uo.Abc (<REDACTED: user-file-path>/extension.js:999:6266)\n\tat async uo.B2c (<REDACTED: user-file-path>/extension.js:998:30782)\n\tat async C2c (<REDACTED: user-file-path>/extension.js:998:27290)\n\tat async uo. (<REDACTED: user-file-path>/extension.js:998:26344)\n\tat async uo.pPc (<REDACTED: user-file-path>/extension.js:1034:6511)\n\tat async uo.z2c (<REDACTED: user-file-path>/extension.js:998:31838)\n\tat async uo. (<REDACTED...

[m365-agent-toolkit-assistant]

👋 Hi @poojakaji,

Thank you for reporting this issue! We want to let you know that:

⏱️ Our team will personally review your issue
🎯 You can expect a response within 2 business days

✨ This is an AI-generated initial response
🤖 AI-Generated Preliminary Analysis:

Classification: Bug — the stack shows an unhandled null/undefined case inside the Toolkit auth flow (loginWithBrowser calling endsWith), not a documented usage error.

• Your report matches open issue bug report: teamsAppExtendToM365.IJe #15708 in OfficeDev/microsoft-365-agents-toolkit.
• The failure occurs inside the VS Code extension auth path during teamsAppExtendToM365, before app logic runs: TypeError: Cannot read properties of undefined (reading 'endsWith').
• I didn’t find a documented “by design” reason for this behavior, and Learn guidance only says M365 sign-in should open the browser and return to VS Code; it doesn’t mention this exception.
• Learn also confirms you should first be able to sign in to Microsoft 365 and see Custom App Upload Enabled in Toolkit.

Upgrade check

• You’re on 6.6.1.
• I could not verify a changelog fix for this specific crash in the current repo changelog; fix status is unverified.

What to do now:

1. In VS Code, sign out/in of Microsoft 365 in Agents Toolkit, then retry.
2. Confirm the account shows Custom App Upload Enabled.
3. If it still fails, try the same flow after clearing Toolkit cached sign-in/session data and restarting VS Code.
4. Add issue details: OS, VS Code version, whether default browser is set, and whether M365 sign-in alone also crashes.

Useful links:

• bug report: teamsAppExtendToM365.IJe #15708
• https://learn.microsoft.com/microsoftteams/platform/toolkit/tools-prerequisites#verify-custom-app-upload-permission
• https://learn.microsoft.com/microsoftteams/platform/get-started/build-basic-tab-app#build-and-run-your-first-tab-app

If you want, I can help draft the exact follow-up comment for the issue.

---

Note: This is an automated first response generated by AI. A human team member will review your issue and provide a more detailed response soon. We appreciate your patience!

[HuihuiWu-Microsoft]

Hi @poojakaji Seems both upn and unique_name for your account is empty which caused the error. I'll patch a fix to avoid the error.