BundleManager is not working properly only for 3 of our primary servers.

All servers have the same configuration: Windows 2008 R2 with ZCM 11.2.3.

When I log on a server with BM then the list of bundle folders is empty and I cannot associat a new bundle with users or devices.
IF I log the another server on the same Zone then it works.
Support of bundle manager said it should be a ZCM server issue with some web service.

Any idea?