[0] Config.pm:304> INFO - This is Biber 2.14
[0] Config.pm:307> INFO - Logfile is 'cachedir/document.blg'
[121] biber:322> INFO - === Mo Sep  7, 2020, 23:18:03
[144] Biber.pm:415> INFO - Reading 'cachedir/document.bcf'
[247] Biber.pm:943> INFO - Found 0 citekeys in bib section 0
[256] Utils.pm:304> WARN - The file 'cachedir/document.bcf' does not contain any citations!
[268] bbl.pm:652> INFO - Writing 'cachedir/document.bbl' with encoding 'UTF-8'
[268] bbl.pm:755> INFO - Output to cachedir/document.bbl
[269] Biber.pm:128> INFO - WARNINGS: 1