Web Compatibility Support • apple.com "service unavailable"

If I want to visit sub-pages of apple.com, they start loading, then get blank and display the 'service unavailable' message.

Example: https://www.apple.com/ipad/

Console says:

CODE:

Error: Could not find root node ID: globalheaderError rendering page: Error: Cancel rendering routeDOMException [SyntaxError: "An invalid or illegal string was specified"]

Pale Moon 34.1.0 Windows 11 and Macos 13.7. Works in regular Firefox.