[Snapshot Pro] Snapshot not uploading properly to Dropbox

My hosting provider is nagging me because I had tons of snapshots on their server. My snapshots create, but never upload to dropbox. I reauthenticated to Dropbox just this week, but the 300 MB snapshot is still uploading after almost 24 hours. (or maybe a bit less, since the 9:00 a.m. might be Denver time, and not Italy time where I am now). Dropbox works fine from other computers. I don't however see ANY snapshots in my dropbox since August of 2018! Ideas please! Thanks.