That error is generally related to files having been renamed or you are not using proper locale settings. the file name showing there is common if you don't use locale emulation or locale settings it sees Japanese characters as random junk much like your screenshot shows.
I would make sure you are using a locale emulator or change your computer to have japanese locale settings. Outside that I would check to make sure you have not changed anything in the game files that would cause this. However, I am about 99% sure this is just a locale issue.