Crashes when attempting a backup

[throwaway789]

When trying to perform a backup Safekeeping crashes. OS is Centos 7. Safekeeping Version 1.0.1 - VDDK Version 6.7.3. Openjdk version "1.8.0_252". Tried different VDDK versions, different transport modes, specifying/not specifying the folder.

7/24/20 17:46:29.718 [INFO, 1, Command, showInfo] BackupInfo: [isNoVmdk false][isDryRun false][compression true][transportMode default][mode auto]
07/24/20 17:46:29.726 [INFO, 30, com.vmware.vmbk.soap.VimConnection, keepAlive] keep alive 2f1778fd-72a2-4e02-9e87-69faad7d4187 : Current Time 2020-07-24T21:46:29.725108Z
07/24/20 17:46:29.726 [INFO, 30, com.vmware.vmbk.soap.KeepAlive, keepAlive] keep alive f032287c-2bfc-46f5-b2d7-bd2f0bd256ea : Name PBM  Version 2.0
07/24/20 17:46:29.919 [WARNING, 1, com.vmware.vmbk.soap.VslmConnection, getIdList] com.vmware.vslm.RuntimeFaultFaultMsg: java.lang.NullPointerException
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at com.sun.xml.internal.ws.fault.SOAPFaultBuilder.createException(SOAPFaultBuilder.java:135)
	at com.sun.xml.internal.ws.client.sei.StubHandler.readResponse(StubHandler.java:238)
	at com.sun.xml.internal.ws.db.DatabindingImpl.deserializeResponse(DatabindingImpl.java:189)
	at com.sun.xml.internal.ws.db.DatabindingImpl.deserializeResponse(DatabindingImpl.java:276)
	at com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:104)
	at com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:77)
	at com.sun.xml.internal.ws.client.sei.SEIStub.invoke(SEIStub.java:147)
	at com.sun.proxy.$Proxy49.vslmListVStorageObjectForSpec(Unknown Source)
	at com.vmware.vmbk.soap.VslmConnection.getIdList(VslmConnection.java:438)
	at com.vmware.vmbk.soap.VslmConnection.retrieveVStorageObjectAssociations(VslmConnection.java:933)
	at com.vmware.vmbk.soap.VslmConnection.retrieveVStorageObjectAssociations(VslmConnection.java:895)
	at com.vmware.vmbk.soap.ConnectionManager.retrieveVStorageObjectAssociations(ConnectionManager.java:817)
	at com.vmware.vmbk.command.CommandWithOptions.retrieveVStorageObjectAssociations(CommandWithOptions.java:680)
	at com.vmware.vmbk.command.CommandWithOptions.getVmTarget(CommandWithOptions.java:587)
	at com.vmware.vmbk.command.CommandWithOptions.getFcoTarget(CommandWithOptions.java:173)
	at com.vmware.vmbk.command.BackupCommand.action(BackupCommand.java:103)
	at com.vmware.vmbkCmd.command.BackupCommandInteractive.action(BackupCommandInteractive.java:88)
	at com.vmware.vmbkCmd.VmbkMain.dispatch(VmbkMain.java:260)
	at com.vmware.vmbkCmd.VmbkMain.run(VmbkMain.java:436)
	at com.vmware.vmbkCmd.VmbkMain.main(VmbkMain.java:102)

07/24/20 17:46:29.945 [WARNING, 1, com.vmware.vmbk.soap.VslmConnection, retrieveVStorageObjectAssociationsById] com.vmware.vslm.RuntimeFaultFaultMsg: InvalidArgument: ids is an empty array
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at com.sun.xml.internal.ws.fault.SOAPFaultBuilder.createException(SOAPFaultBuilder.java:135)
	at com.sun.xml.internal.ws.client.sei.StubHandler.readResponse(StubHandler.java:238)
	at com.sun.xml.internal.ws.db.DatabindingImpl.deserializeResponse(DatabindingImpl.java:189)
	at com.sun.xml.internal.ws.db.DatabindingImpl.deserializeResponse(DatabindingImpl.java:276)
	at com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:104)
	at com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:77)
	at com.sun.xml.internal.ws.client.sei.SEIStub.invoke(SEIStub.java:147)
	at com.sun.proxy.$Proxy49.vslmRetrieveVStorageObjectAssociations(Unknown Source)
	at com.vmware.vmbk.soap.VslmConnection.retrieveVStorageObjectAssociationsById(VslmConnection.java:976)
	at com.vmware.vmbk.soap.VslmConnection.retrieveVStorageObjectAssociations(VslmConnection.java:934)
	at com.vmware.vmbk.soap.VslmConnection.retrieveVStorageObjectAssociations(VslmConnection.java:895)
	at com.vmware.vmbk.soap.ConnectionManager.retrieveVStorageObjectAssociations(ConnectionManager.java:817)
	at com.vmware.vmbk.command.CommandWithOptions.retrieveVStorageObjectAssociations(CommandWithOptions.java:680)
	at com.vmware.vmbk.command.CommandWithOptions.getVmTarget(CommandWithOptions.java:587)
	at com.vmware.vmbk.command.CommandWithOptions.getFcoTarget(CommandWithOptions.java:173)
	at com.vmware.vmbk.command.BackupCommand.action(BackupCommand.java:103)
	at com.vmware.vmbkCmd.command.BackupCommandInteractive.action(BackupCommandInteractive.java:88)
	at com.vmware.vmbkCmd.VmbkMain.dispatch(VmbkMain.java:260)
	at com.vmware.vmbkCmd.VmbkMain.run(VmbkMain.java:436)
	at com.vmware.vmbkCmd.VmbkMain.main(VmbkMain.java:102)

07/24/20 17:46:29.945 [WARNING, 1, Command, action] java.lang.NullPointerException
	at java.util.LinkedList.addAll(LinkedList.java:408)
	at java.util.LinkedList.addAll(LinkedList.java:387)
	at com.vmware.vmbk.soap.ConnectionManager.retrieveVStorageObjectAssociations(ConnectionManager.java:817)
	at com.vmware.vmbk.command.CommandWithOptions.retrieveVStorageObjectAssociations(CommandWithOptions.java:680)
	at com.vmware.vmbk.command.CommandWithOptions.getVmTarget(CommandWithOptions.java:587)
	at com.vmware.vmbk.command.CommandWithOptions.getFcoTarget(CommandWithOptions.java:173)
	at com.vmware.vmbk.command.BackupCommand.action(BackupCommand.java:103)
	at com.vmware.vmbkCmd.command.BackupCommandInteractive.action(BackupCommandInteractive.java:88)
	at com.vmware.vmbkCmd.VmbkMain.dispatch(VmbkMain.java:260)
	at com.vmware.vmbkCmd.VmbkMain.run(VmbkMain.java:436)
	at com.vmware.vmbkCmd.VmbkMain.main(VmbkMain.java:102)