The EOS R1 firmware has been updated to version 1.2.0
This incorporates the following enhancements and fixes:
1. Adds support for the EOS Multi Remote, a remote shooting system for professional photographers.
For an overview and specifications of EOS Multi Remote, please refer to the Canon website:
https://ssw.imaging-saas.canon/app/app.html?app=emr
2. Fixes an issue in which image transfers to an FTP server may fail, displaying Err41.
3. Fixes an issue that, in rare instances, may prevent certain CFexpress cards from being formatted in the camera.
4. Improves other system stability.
You can download the firmware at: https://www.canon.co.uk/support/