What it says on the tin. NPC Jan can say "Git" but players cannot. Here's a screenshot;
Your DS4 might be working out of the box if Steam is making it act like an Xbox controller. So for those of you with that setting on, just turn on Steam and it'll work with PSO2. For those that don't want that setting or lack Steam, use DS4Windows as was suggested. PSO2 doesn't natively support PS4 controllers, it comes from an era where Xinput was only ever supported by PC developers. The Japanese version of the game also doesn't support PS4 controllers, @shad0ws0rr0w - Try not to be so quick to judge.
The claims you are making about the files being invisible and that you can't delete them don't even make sense on a file-system level. Here are where the files are installed for me, all 68GB of them;
They are not hidden at all and you can absolutely delete them. If it complains about permissions, take ownership. This is not a new advanced concept, you can easily look up how.
@Dritoku There is no way you can say you are 50 years old and have played "every MMO on the market" and have never experienced a launch like this before. As a 30 year old that has played the start of many substantial MMO releases since 2003, this is on par with most launch days and many of those games continued to thrive despite your baseless statements about it causing the game to die. The installation issue you are having sucks but there are so many people not having a problem as indicated by the full Ships, so have you considered that it's probably something on your end? The MS Store and a few other features of Win 10 can be very picky about environment. I suggest making a second partition for a fresh Windows installation and see what happens. Considering you've been using a PC for so very long, even you should be able to do that in about 30 minutes time.