[Error] I cant open my game

so I just got back from school exited to continue to make my game and all of a sudden the rpgxp file wouldn't load it would keep saying unexpected file format the picture attached is the error that pops up, if anyone can help me please do

And you couldn't be bothered to use google? https://www.google.com/search?q=rpg maker xp unexpected file format

Your Data is corrupted. Try to find the corrupted file or use a backup.

I don't have a backup and I've searched through the files and I couldn't find it so

It happened to me once when my computer crashed while I was using RMXP. The best option I think is to start over again from your most recent backup.

Otherwise you can try to play with the data files (in Data folder) to see which one(s) is/are causing issues (probably the most recently edited ones). You may try to replace some of them by other ones (if you don't have any backup, you could try using the data files from a fresh version of Essentials).

Naturally, you lose your recent progress either way.