Every planner generates fine but fails to upload to reMarkable Cloud with "Couldn't connect to reMarkable Cloud." The folder picker refresh fails with the same error.
CalSync 1.7.4, Windows, Vault plan, reMarkable rM 2
Signed in to reMarkable Cloud. I disconnected and signed back in with no change. my.remarkable.com loads fine. Diagnose Connection: everything passes (Internet, CalSync Server, License, File System, SSH Firewall, reMarkable Network). Only "reMarkable Cloud" fails.
No VPN. Restarting CalSync didn't help.