Safari Sync Failed - works in other browsers

Hello I am migrating to VaultWarden. My vault syncs and works with Safari on my iPhone. On my MacOS desktop, the Brave browser extension syncs no problem.

With Safari, I can login with the extension, but it does not automatically sync, show Last Sync: Never and when I click Sync vault Now it immediately shows a red box that reads Syncing failed

Desktop and iOS application work normally as well, it is just the MacOS Safari extension.

with journalctl -u vaultwarden I get:

Oct 17 14:31:53 vaultwarden vaultwarden[133]: [2023-10-17 14:31:53.969][request][INFO] POST /identity/connect/token
Oct 17 14:31:53 vaultwarden vaultwarden[133]: [2023-10-17 14:31:53.970][response][INFO] (login) POST /identity/connect/token => 400 Bad Request

Does anyone know of a fix?

Extension version: 2023.9.2

VaultWarden Server version : 1.29.2-008a2cf2

Safari Version 17.0 (18616., 18616)