---
title: "Compiling source code | Customer's Canvas On-Premises"
canonical: "https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/troubleshooting/source-code/"
---

# Compiling source code

> Visual Studio shows the following **Unsupported** message when compiling the project.

## Unsupported Project Error

![The unsupported project error.](images/ProjectNotSupportedError.png)

After you open the migration report which is displayed after the solution is loaded, you will most likely see the following message.

![Web Tools not installed shown in migration report.](images/MigrationReport.png)

### Solution

Start the repair process for your Microsoft Visual Studio, check the Web Developer Tools in the list of optional components, and finish repairing your IDE.

## NewtonSoft.Json Library Missing

When you compile the solution, Visual Studio complains that it cannot find **NewtonSoft.Json** or other libraries.

### Solution

Check if the **Enable NuGet Package Restore** option is enabled in the solution.

## A Feature Supported Only in ECMAScript 6 Error

When you compile the solution, Visual Studio throws several errors saying that certain code works only with ECMAScript 6 or higher.

![The TypeScript version error.](images/TypeScriptVersionError.jpg)

### Solution

Update your [TypeScript](https://marketplace.visualstudio.com/items?itemName=TypeScriptTeam.typescript-382) to version 3.8.2.

## Bunch of TypeScript Errors

When you compile the solution, Visual Studio throws a bunch of TypeScript errors.

### Solution

Check your TypeScript version:

-   In Visual Studio 2015:
    1.  In Visual Studio, on the **Tools** menu, click **Extensions and Updates**.
    2.  In the **Installed Tools** list, click **TypeScript for Microsoft Visual Studio**.
    3.  Verify that the TypeScript version is 3.8.2.
-   Starting from Visual Studio 2017 update 2:
    -   Verify that TypeScript 3.8.2 is available in **Tools** > **Options** > **Text Editor** > **JavaScript** > **IntelliSense**, in the **Use TypeScript version** list.

If you have a different version, install [TypeScript 3.8.2](https://marketplace.visualstudio.com/items?itemName=TypeScriptTeam.typescript-382).