It seems that some file is missing. You could try downloading the emulator again from another site. Anyway, PJ64 does not use any .ini file, but a .rdb (rom database). If that's what's missing, you can get it
here (Duncan's) or
here (Smiff's). Of course, it should already come with the emu. If you want more downloads and useful links, check
here.
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But there is someone who remembers you
Someone waiting for a sign that leads the way to you
There is someone who will die for you
Keep that in mind when the hope fails