Task 'Back up to 'QNAP' ASPSERV_LIVE' has failed on machine 'AcronisAppliance'.

Backup has failed. Please check the log for additional information.
1 Information 6/17/16 6:30:01 PM Task 'Back up to 'QNAP' ASPSERV_LIVE' changed its state from 'idle' to 'running'.
2 Information 6/17/16 6:30:01 PM Task 'Back up to 'QNAP' ASPSERV_LIVE' was started.
3 Information 6/17/16 6:30:02 PM Backing up VM(s).
4 Information 6/17/16 6:30:02 PM Successfully connected to 'VMware vCenter Server 5.5.0 build-2001466'.
5 Information 6/17/16 6:30:02 PM Successfully connected to 'VMware ESXi 5.5.0 build-1331820' through VMware vCenter Server.
6 Information 6/17/16 6:30:02 PM Task 'Back up to 'QNAP' ASPSERV_LIVE' changed its state from 'running' to 'idle'.
7 Error 6/17/16 6:30:02 PM Task 'Back up to 'QNAP' ASPSERV_LIVE' failed: 'Failed to create a backup.
Additional info:
--------------------
Error code: 3
Module: 435
LineInfo: 555b5abba0950340
Fields:
Message: Failed to create a backup.
--------------------
Error code: 32786
Module: 114
LineInfo: 28314c961de7d337
Fields:
Message: Failed to prepare for backing up.
--------------------
Error code: 32853
Module: 114
LineInfo: e8aa69772494a242
Fields:
Message: Failed to check licenses for the instance with ID '964A22AA-8DA5-5E27-DEF9-4ECC474FDE65'.
--------------------
Error code: 14
Module: 202
LineInfo: 9f8a25ba610a0eb1
Fields:
Message: Failed to get licenses for host with ID 964A22AA-8DA5-5E27-DEF9-4ECC474FDE65.
--------------------
Error code: 12
Module: 202
LineInfo: 9f8a25ba610a0eac
Fields:
Message: Failed to obtain license for ESX host. Please check licenses assignment.
--------------------'.