Hello @lsaaraal,
Are you using latest version of WordPress, Tutor LMS and php 7.3 or higher? If you are using a cache plugin you can temporarily disable it then clear cache. Do you have the default instructor registration page unaltered, active and assigned to Tutor settings > instructor tab? Did your instructor sign up using the default registration form?
Students are assigned subscriber role and yes you can manually enroll subscribers to specific course after enabling the enrollments addon which is not included with the free plugin. Instructors are assigned author/tutor instructor user role. When you remove someone as instructor his/her user role becomes subscriber so he/she won’t see the option to add new course button anymore unless you are using a 3rd party plugin to create custom user roles.
You can copy paste the following css to hide “add a new course” button but this will hide it for both admin and instructor
.tutor-dashboard-header-button {
display: none;
}
Safer option is to remove someone as instructor, keep memberships enabled and the new user default role as subscriber from WordPress settings > general. Do not change new user default role to customer, shop manager or any other role.