Nextcloud Desktop client Problem mit mac OSX Sequoia - Hinzufügen von Accounts

I am using macOS Sequoia and the Nextcloud Desktop Client version 3.15.3.

Unfortunately, I am having trouble when creating new accounts in the Nextcloud Desktop Client 3.15.3. After logging in via our server, I am redirected to the “Connect to Account” page. This step works without issues, and the account starts synchronizing after the “Add Account” window, similar to what I am used to from the Windows version.

However, a problem occurs when I restart the computer or similar. I get logged out and have to log in again. The same thing happens if I try to add another account. In this case, the previously created account eventually gets logged out. I am repeatedly prompted to log in to all created accounts. Since I am not a regular Mac user, I would like to know how I can proceed in this situation.

Thanks for any advice!

Best regards,
Maggy