Cannot add users to a group after removing all members on the same screen

When a user opens a User Group in JustCall and removes all members from it, the “Add Users” button becomes disabled (greyed out) on the same page.

At this point, the user cannot add any new members to the group without leaving the screen. The only workaround is to navigate back to the “User Groups” list, search for the same group again, and then edit the group from the list view to add users.

This behavior is inconsistent and causes confusion, especially when managing large teams or frequently updating group memberships.

Steps to Reproduce:

1. Go to Teams > User Groups.

2. Open any existing user group for editing.

3. Remove all members from the group.

4. Try to add new users again — the Add User button will be greyed out.

5. Navigate back to the User Groups list → Edit the same group again → Add users (works fine from here).

Expected Behavior:

After removing all members, users should still be able to add new users on the same screen without needing to leave and re-enter the group.