Need help with coding assignment

[fickle inlet]

https://dontasktoask.com

[pseudo holly]

I was wondering if anyone could take a look at my code as i am supposed to encrypt messages from one file to another and then decrypt the new file into another file, but my program is not opening the first file to begin with

[fossil depot]

look at the #📄・posting-guidelines and try again maybe? it'd be awesome if we could see the code and errors.