[Bug] `Error`: cpp: an 'include' attribute must be a string at: tokenizer.root

Reproducible in vscode.dev or in VS Code Desktop?

• Not reproducible in vscode.dev or VS Code Desktop

Reproducible in the monaco editor playground?

• Not reproducible in the monaco editor playground

Monaco Editor Playground Link

No response

Monaco Editor Playground Code

No response

Reproduction Steps

No response

Actual (Problematic) Behavior

No response

Expected Behavior

No response

Additional Context

I’m working on a Vue 2 project with monaco-editor library and using webpack alongside monaco-editor-webpack-plugin. When initializing the editor with any language, I encounter the following error:

Error: "langauge": an 'include' attribute must be a string at: tokenizer.root.

There are no compilation errors with respect to webpack side of things. I’m using the following versions:

• monaco-editor: 0.21
• monaco-editor-webpack-plugin: 2.1

My issue is similar to #3712 but in this case I'm not defining any custom languages. I also tried using newer versions of monaco-editor and monaco-editor-webpack-plugin but still got the same error. I would appreciate any insights into solving this bug or what I could be doing wrong.

The report provides no reproduction steps, playground link, source files, or tests. Start by reproducing the tokenizer.root error with the stated monaco-editor and monaco-editor-webpack-plugin versions, then compare the behavior with issue #3712 and newer versions. Done means identifying a reliable cause and a confirmed fix or workaround.