Hi @AjaySingh, did you try the step-by-step method provided in the Fitbit CLI guide (https://dev.fitbit.com/getting-started/ )? I did the following steps, and packages installed and project built without any errors. 1. Install Visual Studio Code 2. Install Node.js Version 14 3. If creating a new project, use "npx create-fitbit-app" command. All necessary modules (including @Fitbit/sdk and @Fitbit/sdk-cli) will be installed automatically. No need to install individual packages separately. 4. If editing from an existing project, (a) add the following dependency in package.json (in case of targets of Sense and Versa 3): "devDependencies": { "@fitbit/sdk": "~6.1.0", "@fitbit/sdk-cli": "^1.7.3" } (b) run "npm install". In this case also all necessary modules (including @Fitbit/sdk and @Fitbit/sdk-cli) will be installed automatically. 5. Now, run "npx fitbit-build" to build the project.
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