5240 Call Home failed

Dear guys,

I can't understand why the call home on my appliance fail, I checked some logs unsuccesfully. We have 6 Appliance all configured at the same mode, but only this fail, below th settings:

CallHome Show 
CallHome and Proxy Settings
+-------------------------------------------------------+
| CallHome State  |Enabled                              |
|-----------------+-------------------------------------|
|NBInventory State|Enabled                              |
|-----------------+-------------------------------------|
|   Proxy State   |Enabled                              |
|-----------------+-------------------------------------|
|   Tunnelling    |Enabled                              |
|-----------------+-------------------------------------|
|  Proxy Server   |http://inet1.gtm.XXXXXX.com|
|-----------------+-------------------------------------|
|   Proxy Port    |9090                                 |
|-----------------+-------------------------------------|
| Proxy UserName  |                                     |
+-------------------------------------------------------+

and this the error not very friendly:

CallHome Test
Callhome test failed. Error

below some logs that it can help us:

tail /log/app_vxul/409-2-2818571786-180201-0000000000.log
2,409,2,2,0,1517475602468,278809,47648601901376,0:,39:Started to Check and trigger log upload,6:278712,0,(0|)
2,409,2,2,0,1517475602837,278826,47884692662592,0:,36:Last Trigger Run Time : (1517380202),6:278712,0,(0|)
2,409,2,2,0,1517475602986,278839,47742187133248,0:,35:Component State Time : (1508868678),6:278712,0,(0|)
2,409,2,2,0,1517475603002,278843,47510927788352,0:,68:There is no update in component state time, No logs will be uploaded,6:278712,0,(0|)
2,409,2,2,0,1517476540783,317652,47339599142400,0:,21:Callhome test started,6:317620,0,(0|)
2,409,2,2,0,1517476540801,317654,47980397338112,0:,24:Token is already present,6:317620,0,(0|)
2,409,2,2,0,1517476540813,317656,47039754419712,0:,17:Sending heartbeat,6:317620,0,(0|)
2,409,2,2,0,1517476543119,317888,47049732263424,0:,271:asc_agent::request response code [500], content [{"timestamp":1517476542926,"status":500,"error":"Internal Server Error","exception":"com.symantec.appliance.autosupport.client.common.messaging.AscMsgQueueException","message":"V-475-100-1","path":"/ascws/jobmanager/job"}],6:317620,2,(0|)
2,409,2,2,0,1517476543129,317890,47737966931456,0:,27:send_heartbeat: response [],6:317620,2,(0|)
2,409,2,2,0,1517476543142,317892,47959133093376,0:,57:Callhome test failed due to error while sending heartbeat,6:317620,2,(0|)