This issue has been fixed.
The gateway should be accessible again by June 29th.
The official notice will be added here as well as sent to all users who have opened a support request.
The OneBoss Gateway is currently under maintenance while we make some important modifications.
It is normal that it does not import new contacts or account updates.
We ask you not to configure it, change its configuration or delete it.
We are working very hard to restore the situation as soon as possible.
You can subscribe to updates to receive notifications automatically.
If you have not already done so, you can also contact the support team by email at email@example.com to receive a resolution notice.