When i upgrading project to beta-15

[KInGATiLLa]

Have you read the Contributing Guidelines on issues?

• I have read the Contributing Guidelines on issues.

Prerequisites

• I'm using the latest version of Docusaurus.
• I have tried the npm run clear or yarn clear command.
• I have tried rm -rf node_modules yarn.lock package-lock.json and re-installing packages.
• I have tried creating a repro with https://new.docusaurus.io.
• I have read the console error message carefully (if applicable).

Description

I have upgraded my project deps to latest beta version 15, previously it was beta version 14. It is working in beta version 14. But in beta version 15 it doesn't work. This error occurs on every docs ".md" pages.

Steps to reproduce

1. Dependency update from beta 14 to beta 15.
2. npm start in current project
3. Above error occurs
4. npm run clear
5. rm -rf node_modules/ package-lock.json build .docusaurus
6. npm start
7. Nothing could changed

Expected behavior

It work fine with docs .md pages without error.

Actual behavior

Your environment

• Public source code:
• Public site URL:
• Docusaurus version used: beta-15
• Environment name and version (e.g. Chrome 89, Node.js 16.4): Chrome 98, Node.js 16.13.2
• Operating system and version (e.g. Ubuntu 20.04.2 LTS): Mac Pro M1 monterey

Reproducible demo

No response

Self-service

• I'd be willing to fix this bug myself.

[Josh-Cena]

Hi, you probably have upgraded @mdx-js/react to v2 along the way. See #6520 (comment). You should stay on MDX v1 as we are not compatible with v2 yet. See #4029.

[KInGATiLLa]

Ok i got it