I encountered an error upon arriving at the Pyramid near Neko Village. I can click Retry to make it go away, but it just comes back after a few seconds. Not to mention, but the background music doesn't play upon entering. Here's a screenshot. 
It's quite a well known bug in here. This is strangely the only area that does this, and I'm guessing they forgot to change a bit of the code to reference the rpgmvo file that is the exact same.
There are two fixes to it: a temp solution and a tested solution that is reliable (until the next update that is.)
Reliable solution:
To fix it, find in the audio folder bgm, and find two files that state "El Infausto Landron de Joyas A.rpgmvo" and "El Infausto Landron de Joyas B.rpgmvo"
You'll want to copy them (just in case of corruption) and change the names respectively to "El Infausto Landron de Joyas A.ogg" and "El Infausto Landron de Joyas B.ogg"
Temp Solution:
You can do what I did first time playing it, which was spam the enter key until I got to the underground section, save the game, and refreshed the game. That also seemed to work as a fix.
Unfortunately renaming them didn't work for me, for some reason. As an additional temp solution, go to google and play some desert music on youtube, and spam enter at all times in the area until reaching the underground section . I've found the Super Mario Bros. DS desert level theme works best with fetish games for maximum immersion.
Reliable fix found a little further back in this report page can confirm fixed immediately.
first go into the game files and find folder www, then Audio, then bgm. Find El Infausto Ladron de Joyas. There should be two files: A and B.
Now remane Ladron to Ladrón for both. Thanks Shidoy
i thought i made a comment somewhere around here about that. the solution i found was that a file was misnamed, so you'll have to go into the files and rename it to that. as i recall, it was capitalizing the A at the end, or something...
Edit: ah, thaaaat's right, i remember now... "not sure if anyone posted this yet, but the game keeps stopping during the pyramid. i had to change a file to "El Infausto Ladrón de Joyas A.rpgmvo", notice the "ó" in "Ladrón""
