I’m getting this message when there is no accessory attached.

Are you using an Apple Smart (folio) keyboard?

This alert is typically characteristic of a faulty folio keyboard. The electrical connections that pass though the flexible fabric hinges typically fracture - this usually resulting in errors and/or the on-screen notification that you see.

The Smart folio keyboard is not repairable. The only remedy is replacement of the keyboard.

Hi there Acgds,

Thanks for reaching out to us with this issue you're having seeing that error message with no accessory attached. We're happy to get you going in the right direction for help with this. You will need to get in touch with Apple Support for further assistance. They can be reached here:

Get Support

We hope this helps you.

Cheers!