You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Cloud SyncArea: what it touches
New FeaturesKind: in v2.1.251,
New FeaturesSection of the release
What
New wording explains that this folder's changes could not be synced to the cloud, asks whether to continue without sync, and confirms once the cloud session has been told and is continuing without it.
Details
Which cloud-sync path uses these strings is decided elsewhere in the build; no flag guarding them appears alongside the text.
Evidence
File sync is offline for this session: this folder's changes could not be synced to the cloud after, file sync went offline (the user's machine could not get its file changes to the cloud); the user was told and the session continues without it
Strings lifted out of the shipped bundle, so the claim above can be checked against them.