Sync is stuck (Win10)

Operating system

Windows

Joplin version

2.14.20

Desktop version info

Joplin 2.14.20 (prod, win32)

ID client : 7ffc6fe4ece742848b78070b82838a06
Version de Synchro : 3
Version du profil : 46
Trousseau supporté : Oui

Révision : cfd98e3

Admonition markdown extension: 1.1.0
Backup: 1.4.0
Favorites: 1.3.2

Sync target

Dropbox

What issue do you have?

Today the sync button is stuck, if I cancel it's stuck too. It's weird, usually the sync is pristine, it takes just few seconds. For information the IOS app works well. Any idea ? I tried the safe mode but it doesn't help.