[Script 'PokemonMap' Line 78: NoMethodError Ocurred. Undefined method `bridge=' for nil:Nil class]

I just comprobed it, and no, I don't have any mods installed, just the game 

[Script 'PokemonMap' Line 78: NoMethodError Ocurred. Undefined method `bridge=' for nil:Nil class]

Hi! I think not?

 

[Script 'PokemonMap' Line 78: NoMethodError Ocurred. Undefined method `bridge=' for nil:Nil class]

Hi!

 

I have a huge trouble with my game (ver. 18.4.). I try to go out Spinel Town but I can't due to this error: which blocks the game and appears with this message: "Script 'PokemonMap' Line 78: NoMethodError Ocurred. Undefined method `bridge=' for nil:Nil class". I tried first to play with the game-z version, then I tried to make copies of the last saves and deleted the older ones the C disk, and I even reinstalled all the game again, and it is still blocked. I did all of this reading the comments on this platform, more precisly, I have consulted these links: 

 

A Guide to Using Your Backup Saves

MAPPING ERROR

 

Despite reading these advices, I am still stucked :(

 

Is there any other way to fix this problem without losing my current game? 

 

Thank you in advance!