I ask if you can check your Japanese PSN Store and report if you can or cannot visually confirm if the "MODELER" DLC is still there or not. It does not appear for me. This is very troublesome. This is the only missing file.
Without such DLC, it is not possible to play with up-to-date players in Free Battle.
If a link for external source for this file/DLC can be found if possible. It would be pleasing if you can share.
This is a dire situation. Let us work together!
Thank you for very kind to read this! (*´・ｖ・)