Thank you for help, it worked for me too !
I am surprised that this error/bug looks usual from Sega. I think I got the same error from Japanese version of this game 8 years before...
Same Problem here, here is my operation detail :
I tryed it to repeat at least 10 times. I've also tryed to erase all files contained into "PHANTASYSTARONLINE2_NA_STEAM" folder but nothing change.
I am requiring help.