[Script 'PokemonLoad' line 461: NoMethodError occured. undefined method 'lastSave' for nil:NilClass]

Yesterday i played the game it ran smoothly no problems. Today morning i opened to solve that froakie puzzle and here i am stuck unable to play. Some script line error keeps popping up. I even removed the most recent save renamed the previous one still its not working
 

Script 'PokemonLoad' line 461: NoMethodError occured. undefined method 'lastSave' for nil:NilClass this is the whole thing and even when the game starts up it shows many script errors what to do..??

 

 

[unitialized constant IntroEventScene::PBSpecies]

THANK U. it worked the back up worked so I'm able to play it....!! 

[unitialized constant IntroEventScene::PBSpecies]

I was in that Mirror Gym stage. Before the fight i used debug just to see if it works and changed the stats of Pachirisu. But then in middle of battle i pressed rest and themn the game didnt open after that.

https://drive.google.com/file/d/1o75C55viAGGhctLGEQUXTxkWBvGfukxe/view?usp=sharing the link has the pic.

Please tell me what i should do