Pk3ds "failed to load game data from romfs please check your rom dump is correct."

[TedTom]

Hi there. So, for the past couple of months, I have been creating my own rom hack using Pk3ds. Editing went along smoothly up until about two months ago where I received this error message and have yet to figure out a way to maneuver around it. I have no idea what this error message means, and I very much wish to continue creating my rom hack, so if anyone can help me figure out a fix for this, I'd very much appreciate it.