[0] Config.pm:311> INFO - This is Biber 2.16
[0] Config.pm:314> INFO - Logfile is 'slides.blg'
[53] biber:340> INFO - === Do Mär 31, 2022, 16:44:30
[63] Biber.pm:415> INFO - Reading 'slides.bcf'
[113] Biber.pm:952> INFO - Found 0 citekeys in bib section 0
[117] Utils.pm:395> WARN - The file 'slides.bcf' does not contain any citations!
[123] bbl.pm:654> INFO - Writing 'slides.bbl' with encoding 'UTF-8'
[124] bbl.pm:757> INFO - Output to slides.bbl
[124] Biber.pm:128> INFO - WARNINGS: 1