What could be the reason for this 'citation undefined' error?

I am working on a relatively large document with many citations.
Suddenly (or so it seems) I am getting the highly frustating ‘citation undefined’ error.
The MWE below also produces it

% !TEX program = xelatex
% !BIB program = biber

documentclass[a4paper,11pt]{article}
usepackage{biblatex}
bibliography{/PATH_TO_BIB/minbib.bib} 

begin{document}
I hate LaTeXcite{Dough}
printbibliography
end{document

Here is the (almost) minimal ‘minbib’ file

@book{Dough,
    title = {Latex is a pain in the ass},
    author = {John Doughnut},
    series = {International series of facepalms},
    year = {2021},
    publisher = {Suicidal Press},
    keywords = {frustation}
}

and I am getting the famous

Citation 'Dough' on page 1 undefined.

and the pdf is not produced.

Please note that my document compiled fine using xelatex and biber before and that I do not think I made other changes than adding more text in the main body of my document.

I am using vscode with the Latex Workshop extension.

I would be grateful if someone could try the same piece of code and tell me the results. Thank you very much.

% !TEX program = xelatex
% !BIB program = biber

documentclass[a4paper,11pt]{article}
usepackage{biblatex}
bibliography{mybibfolder/minbib.bib} 

begin{document}
I hate LaTeXcite{Dough}
printbibliography
end{document}