Viva Sales Outlook Add-In prevents sending meeting invitations.

Viva Sales Outlook Add-In prevents sending meeting invitations since the upgrade to outlook Outlook 16.74.1 on macOS 13.4 (22F66) (Apple M2 platform). After hitting the send-button the error message attached below appears.

Also, the following info message appears shortly.

Problem does not occur when sending emails.

As a temporary workaround we have now removed the add-in via the admin portal and after approx. 20 hours all users were able to send meeting invitations again.

Has anyone experienced the same issue or can provide any input?