The 5.21 update seems to have created an issue or modified the workflow for producing designs.
Upon the initial setup of the project, the Job Site Manager allows assigning of controllers as usual, however, when moving on to creating the design the controllers section in the Create Design Panel is absent any controllers and no designs will actually be produced at this point. Fortunately, I discovered a work around that populates the controllers in the Create Design Panel by going back to the Job Sites Manager and creating a ProjectLibrary folder. After resolving the designs, the program seems to function as expected from that point forward. Is this as intended or does something need to be fixed?