For Cloud Sync connection or sync errors, the knowledge base suggests these checks and fixes:
- If the problem is with OneDrive, changes in OneDrive’s API can cause an “Invalid account” error even after re-authenticating. In that case, unlink the account and create a new connection:
1. Click Manage > Unlink
2. Click + Create and follow the wizard to establish a new OneDrive connection
Cloud Sync will then compare existing files and sync changes based on your settings. [7]
- If Cloud Sync says the sync folder does not exist, check whether the local or remote folder was renamed or deleted. Go to Cloud Sync > Task List and double-click the path to verify the local path, and also check the remote path in your cloud storage. If either folder is missing, you need to create a new sync task. [12]
- Cloud Sync supports many services, including Dropbox, Google Drive, Microsoft OneDrive, Microsoft SharePoint, Box, Baidu Cloud, WebDAV, Google Cloud Storage, and others. [3]
- There is also a release note fix for an issue where users with OneDrive for Business could not create a connection, and another fix for Dropbox Team Space connection creation. [1]
If you want, I can also help you narrow this down by cloud provider.
Sources used: [1], [3], [7], [12]