---
title: Compile error when theme projects are updated
slug: configured-commerce/docs/compile-error-when-updating-your-theme-projects-4-4-5-41356-or-later-in-classic
docTags: 
createdAt: 2026-08-13T10:46:23.000Z
---

:::hint{type="warning"}
**Important**

Classic CMS reached end-of-life in January 2025 and is no longer receiving feature updates or bug fixes. You should \[migrate to Spire CMS]\(../../End user docs/spire-cms/get-started-with-spire-cms/migrate-from-classic-cms-to-spire-cms.mdx).
:::

When updating your theme projects to version 4.4.5.41356 or later, you will need to make some edits to your theme project files to avoid getting a compile error.

1. Go to the file:
   .\src\Epi B2B Commerce.Web\Themes\yourtheme\yourtheme.csproj  ("yourtheme" = theme name)
2. Open the file in a text editor.
3. Remove the 3 XML nodes containing the text "DotNetCompilerPlatform" (two Import nodes and one Reference)

![](https://api.archbee.com/api/optimize/BrbvVORKJ5iIeSMZye5kI/I7slZJaOPsYmGY85DwW3X_2cadf15-xmlnodes.png)