Biber not writing output to bbl file

Question

I use Texshop and Texstudio, and biber. All of a sudden my citations are not compiling properly. MWE:

\documentclass[a4,british,12pt]{article}
\usepackage[notes,backend=biber,hyperref=false,giveninits=true]{biblatex-chicago}
\addbibresource{/Users/fabrec/Dropbox/LATEX/texmf/bibtex/library.bib}

Here is the blg message:

[0] Config.pm:304> INFO - This is Biber 2.14
[0] Config.pm:307> INFO - Logfile is 'War Dutie to Protect and Military Abolitionism.blg'
[94] biber-darwin:322> INFO - === Sun Mar 21, 2021, 21:58:33
[114] Biber.pm:415> INFO - Reading 'War Dutie to Protect and Military Abolitionism.bcf'
[274] Biber.pm:943> INFO - Found 17 citekeys in bib section 0
[290] Biber.pm:4256> INFO - Processing section 0
[291] Utils.pm:75> INFO - Globbing data source '/Users/fabrec/Dropbox/LATEX/texmf/bibtex/library.bib'
[291] Utils.pm:91> INFO - Globbed data source '/Users/fabrec/Dropbox/LATEX/texmf/bibtex/library.bib' to /Users/fabrec/Dropbox/LATEX/texmf/bibtex/library.bib
[303] Biber.pm:4455> INFO - Looking for bibtex format file '/Users/fabrec/Dropbox/LATEX/texmf/bibtex/library.bib' for section 0
[516] bibtex.pm:1653> INFO - LaTeX decoding ...
[10256] bibtex.pm:1471> INFO - Found BibTeX data source '/Users/fabrec/Dropbox/LATEX/texmf/bibtex/library.bib'

I have reinstalled both MacTex and Texstudio, deleted aux and bbl and tried again, etc. It worked fine two days ago.