We have enabled "Allow Effort Task Creation" to projects and custom investments with version 15.8.1. It is working for projects created without selecting a Project template, however it is not working with a project template.
Release : 15.8.1
Component : CA PPM FINANCIAL MANAGEMENT
Project template was created before "Allow Effort Task Creation" was checked and therefore did not contain effort task. To overcome this current templates will need to be modified, we simply disabled the task auto numbering, created a new task with ID ~rmw and then it will work without having to recreate the new template. The benefits of the effort task is that all the staff that are assigned to the project are automatically assigned to the effort task, which is not for any other types of tasks that does not have an ID ~rmw.