That's precisely the problem, at least as far as I can tell.
I used SCIM successfully in Daryna for months. But damned if I can get the SCIM icon and menu to appear in Elyssa.
I used the same steps to set up SCIM in Elyssa as I did in Daryna, but this time it won't take.
I click on the box that activates SCIM, but it automatically unchecks itself before I can reboot.