BibTeX, biblatex and biber ⇒ Problem with bibliography

[Nonotex]

Hello,

This year is my first time using Latex and I'm trying to improve myself (also for my thesis).

I have encountered a problem with my bibliography, everything was working fine and I added a new bib file because some documents are not recognized by zotero and I added manually the references in the file.

To not make the operation each time I update my biblio, I saw that i could use multiple bib files.

Then an error appeared and nothing was working anymore even when cmd+z my code to restore It.

I joined some photos with my code for only the first bib file (still not working).

Thanks in advance !