[RMMV] HAVING TROUBLE WITH INITIAL PLAYTEST

So I'm a new developer using RPG Maker MV. I finished my first room and wanted to play test it, but after pressing "New Game" at the title screen, an error occurs.

"Error
Failed to load: data/map001.json"

Anyone have an idea on what could be causing this? I've tried saving out and reloading the engine, making sure there is a walkable path on the map, and the only idea I got is probably the initial spawn point. I looked up solutions on Google but wasn't lucky in finding an answer. I'm going to keep digging through tutorials and hopefully I can find how to move the spawn point in the meanwhile.

Thanks for reading.