Hi.
Connect the CronusMax v3 via pc prog slot to your computer. install software and have a look if there is an update available.
Then put the CronusMax into the ps4 and the hub into the CronusMax. Now you have to connect the QuadStick and original ps4 controller with the hub. That should work...I think.
I've connected it like that but also followed the settings for the "direct connect setup" from
QuadStick support page.
After a while I noticed that I didn't change the CronusMax Slot to 1 for playing, I just forgot it but it worked. So I think it could work without any extra settings with a hub.
If not, try to put the QuadStick into the first slot of the hub and the ps4 controller into the last one (I read something about that while searching for compatible hubs, but I bought just a "normal" one).
Hope this helps.