Task 'BISOrca Backup Scheduled' has failed on machine 'AcronisAppliance'.

Backup has failed. Please check the log for additional information.
1 Information 4/19/16 9:00:02 PM Task 'BISOrca Backup Scheduled' changed its state from 'idle' to 'running'.
2 Information 4/19/16 9:00:02 PM Task 'BISOrca Backup Scheduled' was started.
3 Information 4/19/16 9:00:02 PM Backing up VM(s).
4 Information 4/19/16 9:00:02 PM The archive 'Archive' is missing. New archive is created.
5 Information 4/19/16 9:00:02 PM Successfully connected to 'VMware vCenter Server 5.5.0 build-2001466'.
6 Information 4/19/16 9:00:02 PM Successfully connected to 'VMware ESXi 5.5.0 build-1331820' through VMware vCenter Server.
7 Information 4/19/16 9:00:03 PM Successfully connected to 'VMware ESXi 5.5.0 build-1331820' through VMware vCenter Server.
8 Information 4/19/16 9:00:03 PM Successfully connected to 'VMware ESXi 5.5.0 build-1623387' through VMware vCenter Server.
9 Information 4/19/16 9:00:03 PM Successfully connected to 'VMware vCenter Server 5.5.0 build-2001466'.
10 Information 4/19/16 9:00:04 PM Failed to write to file 'avfs:/smb?//bisqnap/Virtiual%20Machine/BisOrca/6F5E611C-DA49-4B73-8517-F86FB0FC9F08'.
Additional info:
--------------------
Error code: 26
Module: 146
LineInfo: 4d7f75fcde07d78d
Fields: IsReturnCode : 1
Message: Failed to write to file 'avfs:/smb?//bisqnap/Virtiual%20Machine/BisOrca/6F5E611C-DA49-4B73-8517-F86FB0FC9F08'.
--------------------
Error code: 12
Module: 4
LineInfo: 3d9ea26f1bfdf083
Fields:
Message: The file is read-only.
--------------------
Error code: 65521
Module: 0
LineInfo: bd28fdbd64edb8d0
Fields: code : 30
Message: Read-only file system
--------------------
11 Information 4/19/16 9:00:04 PM Successfully connected to 'VMware vCenter Server 5.5.0 build-2001466'.
12 Information 4/19/16 9:00:04 PM Successfully connected to 'VMware ESXi 5.5.0 build-1331820' through VMware vCenter Server.
13 Error 4/19/16 9:02:09 PM Failed to perform the requested operation.
Additional info:
--------------------
Error code: 13
Module: 149
LineInfo: d1ab7fa1e56eca4e
Fields:
Message: Failed to perform the requested operation.
--------------------
Error code: 103
Module: 83
LineInfo: a859dd78cc91df40
Fields:
Message: Failed to open the virtual machine ([datastore 101] 2008R2 Oracle1/2008R2 Oracle1.vmx).
--------------------
Error code: 253
Module: 83
LineInfo: c7610e0a857bedf4
Fields:
Message: VMware error: 'Remote method call failed.'.
--------------------
Error code: 32
Module: 0
LineInfo: c7610e0a857bedf4
Fields:
Message: Awaiting task 'CreateSnapshot' has failed. Reason: An error occurred while saving the snapshot: Failed to quiesce the virtual machine..
--------------------
14 Error 4/19/16 9:02:09 PM The operation has failed.
Additional info:
--------------------
Error code: 26
Module: 100
LineInfo: 48afbd3608a410ca
Fields:
Message: The operation has failed.
--------------------
Error code: 1080
Module: 1
LineInfo: d1ab7fa1e56ec8bf
Fields:
Message:
--------------------
Error code: 13
Module: 149
LineInfo: d1ab7fa1e56eca4e
Fields:
Message: Failed to perform the requested operation.
--------------------
Error code: 103
Module: 83
LineInfo: a859dd78cc91df40
Fields:
Message: Failed to open the virtual machine ([datastore 101] 2008R2 Oracle1/2008R2 Oracle1.vmx).
--------------------
Error code: 253
Module: 83
LineInfo: c7610e0a857bedf4
Fields:
Message: VMware error: 'Remote method call failed.'.
--------------------
Error code: 32
Module: 0
LineInfo: c7610e0a857bedf4
Fields:
Message: Awaiting task 'CreateSnapshot' has failed. Reason: An error occurred while saving the snapshot: Failed to quiesce the virtual machine..
--------------------
15 Information 4/19/16 9:02:09 PM Task 'BISOrca Backup Scheduled' changed its state from 'running' to 'idle'.
16 Error 4/19/16 9:02:09 PM Task 'BISOrca Backup Scheduled' 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: 353
Module: 149
LineInfo: a71592046cb2c5f6
Fields:
Message: Failed to back up the group.
--------------------
Error code: 2
Module: 218
LineInfo: 338a407ad20e0987
Fields:
Message: Error occurred while running the backup and recovery engine.
--------------------
Error code: 1080
Module: 1
LineInfo: d1ab7fa1e56ec8bf
Fields:
Message:
--------------------
Error code: 13
Module: 149
LineInfo: d1ab7fa1e56eca4e
Fields:
Message: Failed to perform the requested operation.
--------------------
Error code: 103
Module: 83
LineInfo: a859dd78cc91df40
Fields:
Message: Failed to open the virtual machine ([datastore 101] 2008R2 Oracle1/2008R2 Oracle1.vmx).
--------------------
Error code: 253
Module: 83
LineInfo: c7610e0a857bedf4
Fields:
Message: VMware error: 'Remote method call failed.'.
--------------------
Error code: 32
Module: 0
LineInfo: c7610e0a857bedf4
Fields:
Message: Awaiting task 'CreateSnapshot' has failed. Reason: An error occurred while saving the snapshot: Failed to quiesce the virtual machine..
--------------------'.