Cross sync with VMWare Backup Appliance failed (NW_3001:An exception occurred posting a message to vcenter)

Hi, I have an issue with the Cross Sync on VBA (v 1.5.1.7). Has anyone seen this?

Daemon log on NW server:

10/11/16 10:54:01  nsrd NSR info nsrim cross sync notice: Cross sync with 'vba01.local' VMWare Backup Appliance started.

10/11/16 10:54:01  nsrdisp_nwbg NSR notice 10/11/16 10:54:01.725031 Cross sync all configuration on VBA "vba01.local".

10/11/16 10:54:01  (pid3141) NSR info VBA returned status of FAILURE: details "NW_3001:An exception occurred posting a message to vcenter.  Input Parameters: Class: VcenterPostMessageInput EventMessageType: com.vmware.nw.generic MessageParameters: {genericMessage=Cross sync with Networker Server 'nlosimbck02' started}

java.lang.NullPointerException

        at com.emc.networker2.business.NwVcPostMessageBusiness.vcenterPostMessage(NwVcPostMessageBusiness.java:35)

        at com.emc.networker2.rest.NwVcenterService.vcenterPostMessage(NwVcenterService.java:88)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

        at java.lang.reflect.Method.invoke(Unknown Source)

...

126088 10/11/16 10:54:01  nsrdisp_nwbg NSR notice Unable to post the Cross Sync message to VBA server.

126088 10/11/16 10:54:01  nsrdisp_nwbg NSR notice Unable to post the Cross Sync message to VBA server.

38758 10/11/16 10:54:01  nsrd NSR info nsrim cross sync alert: Cross Sync with 'vba01.local' VMWare Backup Appliance is failed for configuration and backups.