Hello ! Thanks again for your time and answers, I really appreciate how you're always willing to help ! I tried everything, but nothing worked. I ended up deleting everything and reinstalled fresh files from your page, then filled everything out manually, and... This time, everything works perfectly fine, though I can't explain why. I guess code works in mysterious ways ? They said that the error is usually found between the chair and the computer, and I believe that was the case here x'D ! Must have made an error when I customized the code for the first time.
Thank you again for your help and your time. I'm sorry to have bothered you, and I can only thank you again for your kindness !