The "Babel and next/font Conflict" error arises when you attempt to use next/font in conjunction with a custom Babel configuration in your Next.js application. When you have a custom Babel config, you opt out of the Next.js Compiler, which is a requirement for using next/font.

To address this issue, you should remove your custom Babel configuration (e.g. .babelrc) and instead make use of the Next.js Compiler. This ensures compatibility between your Babel configuration and next/font.

• Next.js Compiler - Learn more about the Next.js Compiler and how it benefits your application.
• Customizing Babel Config - Understand more about how to customize your Babel configuration in a Next.js application, and the implications of doing so.