Sync portable version on Win 11 with dropbox

Operating system

Windows

Joplin version

2.14.20

Desktop version info

Joplin 2.14.20 (prod, win32)
Client-ID: 099af278384b46fe84b41bf9e18a818a
Sync-Version: 3
Profil-Version: 46
Unterstützter Schlüsselbund: Nein
Revision: cfd98e3
Backup: 1.4.0

Sync target

Dropbox

What issue do you have?

I use the portable App on two different notebooks with Windows 10 and on two android devices. The synchronization with dropbox works fine.
But I tried to use the portable App on a new Windows 11 notebook.

I tried various settings with encryption and without encryption, with master password etc., but I just can't get the synchronization to work on this Windows 11 platform.
my setting: Encryption is disabled
Master password: valid

Any further idea? Do I need to change to the non-portable App?

Screenshots

2024-04-30 11_09_17-Window.png