After initial setup, my BT Cloud ( v21.12.15 on Windows10) seemed to sync fine. However, after that initial sync it has simply stopped uploading new files. Looking in the web interface they are not there, and the GUI on the app shows the last upload about a month ago too.
I can save the logs and post them here if there's a BT developer that will find the useful. There's lots of different exceptions logged, from 404's, 403's and a bunch of Sncr.Cloud.Core.Data.RepositoryException's too. But I won't go through the effort unless an actual dev is going to look at them!
I've tried restarting the app, and logging out and back in again - no change.