---
title: Assette VS Code Extension Troubleshooting
description: "The following article provides guidance for troubleshooting issue with Assette's Visual Studio Code Plug-in. If your issue is not listed, please contact [clientservice@assette.com](mailto:clientservice@assette.com). ## Assette VS Code Extension Installation Issues If you experience issues installing or accessing the extension: -…"
url: "https://learn.assette.com/docs/assette-vs-code-plug-in-troubleshooting/"
updated: "2025-05-21"
category: Developers / Developer Tools / Tool Setup / Troubleshooting
---

# Assette VS Code Extension Troubleshooting

The following article provides guidance for troubleshooting issue with Assette's Visual Studio Code Plug-in. If your issue is not listed, please contact [clientservice@assette.com](mailto:clientservice@assette.com).

## Assette VS Code Extension Installation Issues

If you experience issues installing or accessing the extension:

- Ensure you are connected to the internet.
- Confirm that you have installed VS Code and not VS Code Insiders or another editor.
- Verify that there are no conflicting extensions installed that interfere with network activity.
- Check for error messages in the **Output** panel or **Extensions** log by clicking **View > Output** and selecting the relevant source from the dropdown.

## Troubleshooting Sign-In Issues

If you encounter issues during the SSO sign-in process:

### The browser does not open:

- Ensure your system allows applications to open external URLs.
- Try right-clicking the **Sign In** button and selecting **Copy Link**, then manually open it in a browser.

### Incorrect or missing Client ID:

- Double-check the Client ID for typos or incorrect casing.
- Confirm with your administrator if you’re unsure of your firm’s ID.

### SSO login fails in the browser:

- Ensure you are using your corporate credentials.
- If Multi-Factor Authentication (MFA) is required, complete all steps.
- Contact your internal IT or SSO administrator if login fails consistently.

### Sign-in appears to succeed, but VS Code does not update:

- Restart VS Code to ensure token refresh.
- Check for background errors in the **Output panel** by navigating to **View > Output** and selecting “Assette” from the dropdown.

## Failure to Upload Data Block - Additional Whitespace

**Symptoms:**

- Unable to upload a Data Block to Assette via the Visual Studio Code (VS Code) Plug-in
- Receive the following error message when trying to upload a Data Block:
  - Template Upload Failed: AxiosError: Request failed with status code 400
    Source: Assette Block Editor

![Assette VS Code Extension Troubleshooting 1](https://learn.assette.com/wp-content/uploads/2024/10/image-117.png)

**Possible Causes & Solutions**

This error is likely caused by removing or altering the Python comment which Assette uses to identify the start and stop of the Data Block.

```
 # ----Code start identification-do not remove this line---
^ Additional leading whitespace added
```

The difference is small, but this may accidentally occur when VS Code has a Python Formatter Plug-in enabled. To resolve this issue, manually remove the additional whitespace(s).

```
# ----Code start identification-do not remove this line---
^ Additional leading whitespace removed
```

## Data Blocks in Assette Won't Sync to VS Code

If changes don’t appear after upload:

- Click the **Refresh** button in the extension toolbar to re-sync the tree view.
- Review the **logs/** folder for error messages.
- Open the **Output panel** via `View > Output` and choose “Assette” from the dropdown to review extension logs.

> **Important**: Only authenticated users can upload. If your session has expired, you will be prompted to re-authenticate.