Resource Board Manager is a cloned Platform Manager role and requires media, news, and resource board tasks to be selected in order for the role to edit and add to the Resource Boards.

Refer to How do I create a clone of a role?

Once the role is cloned:
  1. Navigate to Core > Security > Roles
  2. Select Manage Roles
  3. Select the cloned Platform Manager role
  4. Select Tasks under Role
  5. In the tasks section check off the following tasks to enable the cloned Platform Manager to create and edit Resource Boards:
User-added image
User-added imageUser-added image
User-added image