How to install new kernels in workspace with EMR Studio

Hi there, I need to create a custom kernel with my own libraries for use in EMR, so Im trying to follow this EMR Workshop https://catalog.us-east-1.prod.workshops.aws/workshops/3c29bc13-0f30-42f7-9f97-4ce8e2ef9b17/en-US/kernels-and-libraries/additional-kernels

All works ok, but I can't get the new kernel in the launch notebook section. I don't know if this is because the new studio version, but I can't use it after I installed,

Do you know what could it be? Is there another tutorial I can follow?

I already try the installing additional kernels and libraries from the EMR documentation.

Thanks!