RPG Maker 3 for PS2 always "save failed"

I am having an issue with RPG Maker 3 for PS2. Every time I try to save my data onto the memory card, I always get "save failed" "The memory card was removed during saving" but nothing could be further from the truth! I DID NOT remove the memory card at all! It does this EVERY TIME I hit 'Retry'. It will say "saving" for about 10 seconds then ALWAYS fail with that error message.

I Googled 'RPG Maker 3 PS2 "save failed"' (note the quotes) but only got unrelated results. Throwing quotes...

RPG Maker 3 for PS2 always "save failed"