Remove the tool_lp/form-cohort-selector for using the cohort form element instead

Log in as admin Create a new user Create two cohorts Navigate to Users > Permissions > Define roles in site administration Edit the Manager role Select User for Context types where this role may be assigned and save Navigate to Users > Permissions > Assign user roles to cohort  in site administration Select test user for Select users to assign role For Select cohorts , search for and select both test cohorts Press Assign and Continue Confirm under Existing cohort role assignments you see both cohorts listed with appropriate role/user in the table