Attempting to call exportToJSON on a ChatMessage throws an error

[Fyorl]

Originally reported by Mana#4176 https://discord.com/channels/170995199584108546/956306859491471420/1064900367386681507

ALL MODULES DISABLED? true
OS, Hosting, Browser (if applicable): any
Short Description of bug: ChatMesage.exportToJSON() errors
Simple steps to reproduce the bug:

game.messages.contents[0].exportToJSON();

Screenshots and/or console errors:

foundry.js:13647 Uncaught TypeError: Cannot read properties of undefined (reading 'slugify')
    at ChatMessage.exportToJSON (foundry.js:13647:61)

This was mostly relevant for me to export a chat message which was causing a system to error on such to attach to a bug report.