UnhandledPromiseRejectionWarning: SyntaxError: Unexpected token in JSON at position 3324

Prerequisites

• I am running the latest version of Node and the tools
• I checked the documentation and found no answer
• I checked to make sure that this issue has not already been filed

Expected behavior

The generator demo should work

Current behavior

 yo office

     _-----_     ╭──────────────────────────╮
    |       |    │   Welcome to the Office  │
    |--(o)--|    │   Add-in generator, by   │
   `---------´   │ @OfficeDev! Let's create │
    ( _´U`_ )    │    a project together!   │
    /___A___\   /╰──────────────────────────╯
     |  ~  |
   __'.___.'__
 ´   `  |° ´ Y `

? Choose a project type: Office Add-in Task Pane project supporting single sign-on
? Choose a script type: JavaScript
? What do you want to name your add-in? SSO365
? Which Office client application would you like to support? Word

----------------------------------------------------------------------------------

      Creating SSO365 add-in for Word using JavaScript and Single-sign-on at C:\SSO365

----------------------------------------------------------------------------------

      Congratulations! Your add-in has been created! Your next steps:

      1. Go the directory where your project was created:

         cd C:\SSO365

      2. Configure your SSO taskpane add-in:

         npm run configure-sso

      3. Start the local web server and sideload the add-in:

         npm start

      4. Open the project in VS Code:

         code .

         For more information, visit http://code.visualstudio.com.

      Please visit https://docs.microsoft.com/office/dev/add-ins for more information about Office Add-ins.

Steps to Reproduce

Please provide detailed steps for reproducing the issue.

1. run generator as above
2. run npm run configure-sso

Context

Please provide any relevant information about your setup. This is important in case the issue is not reproducible except for under certain conditions.

• Operating System: Windows 10 Pro 10.0.19042 Build 19042
• Node version: 14.15.4
• Office version: 2101 Build 13628.20380 Click-to-Run (Microsoft 365 Apps for business )
• Tool version: yeoman latest

Failure Logs

npm run configure-sso

> office-addin-taskpane-sso-js@0.0.0 configure-sso C:\SSO365
> office-addin-sso configure manifest.xml

(node:17100) UnhandledPromiseRejectionWarning: SyntaxError: Unexpected token  in JSON at position 3324
    at JSON.parse (<anonymous>)
    at C:\SSO365\node_modules\office-addin-sso\lib\configure.js:188:40
    at Generator.next (<anonymous>)
    at C:\SSO365\node_modules\office-addin-sso\lib\configure.js:6:71
    at new Promise (<anonymous>)
    at __awaiter (C:\SSO365\node_modules\office-addin-sso\lib\configure.js:2:12)
    at C:\SSO365\node_modules\office-addin-sso\lib\configure.js:182:95
    at ChildProcess.exithandler (child_process.js:299:7)
    at ChildProcess.emit (events.js:315:20)
    at maybeClose (internal/child_process.js:1048:16)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:17100) 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(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:17100) [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.

[TCourtneyOwen]

Btw, I just published a new version of the SSO template, so if you create a new SSO project via Yo Office, it will have the “office-addin-sso” package update.

Can you please try the running the following at the root of your project to work around the loopback issue:

• Run “npx office-addin-dev-settings appcontainer manifest.xml --loopback”
• Say Yes when prompted with Allow localhost loopback for manifest.xml?

[akrantz]

The starting templates are in separate github repositories. You can clone them and start with them.

However, be sure to customize the manifest and use a unique id by running: npx office-addin-manifest modify --guid --displayName <name>

Here are a few of them: Basic: https://github.com/OfficeDev/Office-Addin-TaskPane React: https://github.com/OfficeDev/Office-Addin-TaskPane-React SSO: https://github.com/OfficeDev/Office-Addin-TaskPane-SSO

The yo-office branch is what is used when you run yo office. The master branch may have more recent changes which should work. We’re constantly working to keep these templates updated.