Yes, you can download the database from Zenodo
https://zenodo.org/record/3957592#.XzYjcB7RZ-E
and run MetaPhlan with the -x mpa_v30_CHOCOPhlAn_201901 parameter.
You probably should update your installation, the latest version (3.0.2) automatically retrieves the database from Zenodo if Dropbox fails.