Sync on PC never Completes

Operating system

Windows

Joplin version

2.14.20

Desktop version info

Joplin 2.14.20 (prod, win32)

Client ID: 28edcd2f7ace4904982487d0a4c064e4
Sync Version: 3
Profile Version: 46
Keychain Supported: Yes

Revision: cfd98e3

Backup: 1.4.0

Sync target

Dropbox

What issue do you have?

Hello,

My desktop version of Joplin has the circle spinning endlessly (for hours) trying to sync, but sync never completes.
I have tried cancelling sync but even doing that doesn't stop the sync circle from spinning.
I have tried closing and restarting Joplin, but as soon as it restarts, the sync circle spins and indicates canceling.
Everything works fine on the version on my Android phone.

Please advise.
Thank you