Legend of zelda ocarina of time startup error

I can still start it, it just runs slowly. This message shows up as soon as the window comes up after double clicking the rom. its only doing it when i select Zelda Ocarina of time. and im pretty sure it has to do with it running slowly cuz before this happened, it ran PERFECTLY. i havent done anything to change it except download new roms. so i dont know what to do. here is an image of the error box!



Any1 know how to fix?

OK I FIXED IT! I changed the CPU core style to Recompiler ( found in options>configure rsp plugin) and it works clean as a whistle!