Adding users to roles - Button missing, it is there in version 7?

I’m not sure if i am mossing something, bit i am trying to add users to a role and the select user button is missing. I am using 8.7.0. I haves testing this again my suitecrm 7 server and the button is there. is it done differently at suitecrm8?

I have search for alternative ways of doing this, and not having any joy!

Any help would be great
Thanks

I have found how to apply the roles to the users via security groups.

so the user i wanted to apply these roles to is in the user security groups and it seems to have applied the correct permissions. but still not show in the user subpanel.

IS this correct and just how v8 works?