"A required disk image was missing" error when importing VMDK

Client version 1.21.0

Client build number: 5724747

ESXi version: 6.5.0

ESXi build number: 6765664

Built an Oracle 7.4 server base configuration, successfully exported it and used the files to import and setup two unique VMs. Attempted it again but for a few VMs with less disk space - got the base Oracle 7.4 setup, exported, but upon importing I always get the error "A required disk image was missing." I can click Finish but when attempting to stat the VM I get the same error. I tried importing the initial larger server VMDK file and am getting the same error so it seems to be something on the console side, not the files... Any ideas? I've googled around and not gotten anywhere.

OVF file:

<?xml version="1.0" encoding="UTF-8"?>

<!--Generated by VMware ESX Server, User: cerner, UTC time: 2017-11-03T16:09:36.47777Z-->

<Envelope vmw:buildId="build-6765664" xmlns="http://schemas.dmtf.org/ovf/envelope/1" xmlns:cim="http://schemas.dmtf.org/wbem/wscim/1/common" xmlns:ovf="http://schemas.dmtf.org/ovf/envelope/1" xmlns:rasd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_ResourceAllocationSettingData" xmlns:vmw="http://www.vmware.com/schema/ovf" xmlns:vssd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_VirtualSystemSettingData" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

  <References>

    <File ovf:href="disk-1.vmdk" ovf:id="file1" ovf:size="0"/>

  </References>

  <DiskSection>

    <Info>Virtual disk information</Info>

    <Disk ovf:capacity="30" ovf:capacityAllocationUnits="byte * 2^30" ovf:diskId="vmdisk1" ovf:fileRef="file1" ovf:format="http://www.vmware.com/interfaces/specifications/vmdk.html#streamOptimized"/>

  </DiskSection>

  <NetworkSection>

    <Info>The list of logical networks</Info>

    <Network ovf:name="VM Network">

      <Description>The VM Network network</Description>

    </Network>

  </NetworkSection>

  <VirtualSystem ovf:id="SmallerBaseBuild">

    <Info>A virtual machine</Info>

    <Name>DWxTA_BaseSOADBuild</Name>

    <OperatingSystemSection ovf:id="109" ovf:version="7" vmw:osType="oracleLinux7_64Guest">

      <Info>The kind of installed guest operating system</Info>

    </OperatingSystemSection>

    <VirtualHardwareSection>

      <Info>Virtual hardware requirements</Info>

      <System>

        <vssd:ElementName>Virtual Hardware Family</vssd:ElementName>

        <vssd:InstanceID>0</vssd:InstanceID>

        <vssd:VirtualSystemIdentifier>SmallerBaseBuild</vssd:VirtualSystemIdentifier>

        <vssd:VirtualSystemType>vmx-13</vssd:VirtualSystemType>

      </System>

      <Item>

        <rasd:AllocationUnits>hertz * 10^6</rasd:AllocationUnits>

        <rasd:Description>Number of Virtual CPUs</rasd:Description>

        <rasd:ElementName>1 virtual CPU(s)</rasd:ElementName>

        <rasd:InstanceID>1</rasd:InstanceID>

        <rasd:ResourceType>3</rasd:ResourceType>

        <rasd:VirtualQuantity>1</rasd:VirtualQuantity>

      </Item>

      <Item>

        <rasd:AllocationUnits>byte * 2^20</rasd:AllocationUnits>

        <rasd:Description>Memory Size</rasd:Description>

        <rasd:ElementName>2048MB of memory</rasd:ElementName>

        <rasd:InstanceID>2</rasd:InstanceID>

        <rasd:ResourceType>4</rasd:ResourceType>

        <rasd:VirtualQuantity>2048</rasd:VirtualQuantity>

      </Item>

      <Item>

        <rasd:Address>0</rasd:Address>

        <rasd:Description>SATA Controller</rasd:Description>

        <rasd:ElementName>SATA Controller 0</rasd:ElementName>

        <rasd:InstanceID>3</rasd:InstanceID>

        <rasd:ResourceSubType>vmware.sata.ahci</rasd:ResourceSubType>

        <rasd:ResourceType>20</rasd:ResourceType>

        <vmw:Config ovf:required="false" vmw:key="slotInfo.pciSlotNumber" vmw:value="33"/>

      </Item>

      <Item>

        <rasd:Address>0</rasd:Address>

        <rasd:Description>SCSI Controller</rasd:Description>

        <rasd:ElementName>SCSI Controller 0</rasd:ElementName>

        <rasd:InstanceID>4</rasd:InstanceID>

        <rasd:ResourceSubType>VirtualSCSI</rasd:ResourceSubType>

        <rasd:ResourceType>6</rasd:ResourceType>

        <vmw:Config ovf:required="false" vmw:key="slotInfo.pciSlotNumber" vmw:value="160"/>

      </Item>

      <Item ovf:required="false">

        <rasd:Address>0</rasd:Address>

        <rasd:Description>USB Controller (XHCI)</rasd:Description>

        <rasd:ElementName>USB xHCI Controller</rasd:ElementName>

        <rasd:InstanceID>5</rasd:InstanceID>

        <rasd:ResourceSubType>vmware.usb.xhci</rasd:ResourceSubType>

        <rasd:ResourceType>23</rasd:ResourceType>

        <vmw:Config ovf:required="false" vmw:key="slotInfo.pciSlotNumber" vmw:value="224"/>

      </Item>

      <Item>

        <rasd:Address>1</rasd:Address>

        <rasd:Description>IDE Controller</rasd:Description>

        <rasd:ElementName>VirtualIDEController 1</rasd:ElementName>

        <rasd:InstanceID>6</rasd:InstanceID>

        <rasd:ResourceType>5</rasd:ResourceType>

      </Item>

      <Item>

        <rasd:Address>0</rasd:Address>

        <rasd:Description>IDE Controller</rasd:Description>

        <rasd:ElementName>VirtualIDEController 0</rasd:ElementName>

        <rasd:InstanceID>7</rasd:InstanceID>

        <rasd:ResourceType>5</rasd:ResourceType>

      </Item>

      <Item ovf:required="false">

        <rasd:AutomaticAllocation>false</rasd:AutomaticAllocation>

        <rasd:ElementName>VirtualVideoCard</rasd:ElementName>

        <rasd:InstanceID>8</rasd:InstanceID>

        <rasd:ResourceType>24</rasd:ResourceType>

        <vmw:Config ovf:required="false" vmw:key="enable3DSupport" vmw:value="false"/>

        <vmw:Config ovf:required="false" vmw:key="use3dRenderer" vmw:value="automatic"/>

        <vmw:Config ovf:required="false" vmw:key="useAutoDetect" vmw:value="false"/>

        <vmw:Config ovf:required="false" vmw:key="videoRamSizeInKB" vmw:value="4096"/>

      </Item>

      <Item ovf:required="false">

        <rasd:AutomaticAllocation>false</rasd:AutomaticAllocation>

        <rasd:ElementName>VirtualVMCIDevice</rasd:ElementName>

        <rasd:InstanceID>9</rasd:InstanceID>

        <rasd:ResourceSubType>vmware.vmci</rasd:ResourceSubType>

        <rasd:ResourceType>1</rasd:ResourceType>

        <vmw:Config ovf:required="false" vmw:key="allowUnrestrictedCommunication" vmw:value="false"/>

        <vmw:Config ovf:required="false" vmw:key="slotInfo.pciSlotNumber" vmw:value="32"/>

      </Item>

      <Item ovf:required="false">

        <rasd:AddressOnParent>0</rasd:AddressOnParent>

        <rasd:AutomaticAllocation>false</rasd:AutomaticAllocation>

        <rasd:ElementName>CD-ROM 1</rasd:ElementName>

        <rasd:InstanceID>10</rasd:InstanceID>

        <rasd:Parent>3</rasd:Parent>

        <rasd:ResourceSubType>vmware.cdrom.atapi</rasd:ResourceSubType>

        <rasd:ResourceType>15</rasd:ResourceType>

      </Item>

      <Item>

        <rasd:AddressOnParent>0</rasd:AddressOnParent>

        <rasd:ElementName>Hard Disk 1</rasd:ElementName>

        <rasd:HostResource>ovf:/disk/vmdisk1</rasd:HostResource>

        <rasd:InstanceID>11</rasd:InstanceID>

        <rasd:Parent>4</rasd:Parent>

        <rasd:ResourceType>17</rasd:ResourceType>

        <vmw:Config ovf:required="false" vmw:key="backing.writeThrough" vmw:value="false"/>

      </Item>

      <Item>

        <rasd:AddressOnParent>7</rasd:AddressOnParent>

        <rasd:AutomaticAllocation>true</rasd:AutomaticAllocation>

        <rasd:Connection>VM Network</rasd:Connection>

        <rasd:Description>VmxNet3 ethernet adapter on &quot;VM Network&quot;</rasd:Description>

        <rasd:ElementName>Ethernet 1</rasd:ElementName>

        <rasd:InstanceID>12</rasd:InstanceID>

        <rasd:ResourceSubType>VmxNet3</rasd:ResourceSubType>

        <rasd:ResourceType>10</rasd:ResourceType>

        <vmw:Config ovf:required="false" vmw:key="slotInfo.pciSlotNumber" vmw:value="192"/>

        <vmw:Config ovf:required="false" vmw:key="wakeOnLanEnabled" vmw:value="false"/>

      </Item>

      <vmw:Config ovf:required="false" vmw:key="cpuHotAddEnabled" vmw:value="false"/>

      <vmw:Config ovf:required="false" vmw:key="cpuHotRemoveEnabled" vmw:value="false"/>

      <vmw:Config ovf:required="false" vmw:key="firmware" vmw:value="bios"/>

      <vmw:Config ovf:required="false" vmw:key="virtualICH7MPresent" vmw:value="false"/>

      <vmw:Config ovf:required="false" vmw:key="virtualSMCPresent" vmw:value="false"/>

      <vmw:Config ovf:required="false" vmw:key="memoryHotAddEnabled" vmw:value="false"/>

      <vmw:Config ovf:required="false" vmw:key="nestedHVEnabled" vmw:value="false"/>

      <vmw:Config ovf:required="false" vmw:key="powerOpInfo.powerOffType" vmw:value="soft"/>

      <vmw:Config ovf:required="false" vmw:key="powerOpInfo.resetType" vmw:value="soft"/>

      <vmw:Config ovf:required="false" vmw:key="powerOpInfo.standbyAction" vmw:value="checkpoint"/>

      <vmw:Config ovf:required="false" vmw:key="powerOpInfo.suspendType" vmw:value="soft"/>

      <vmw:Config ovf:required="false" vmw:key="tools.afterPowerOn" vmw:value="true"/>

      <vmw:Config ovf:required="false" vmw:key="tools.afterResume" vmw:value="true"/>

      <vmw:Config ovf:required="false" vmw:key="tools.beforeGuestShutdown" vmw:value="true"/>

      <vmw:Config ovf:required="false" vmw:key="tools.beforeGuestStandby" vmw:value="true"/>

      <vmw:Config ovf:required="false" vmw:key="tools.syncTimeWithHost" vmw:value="false"/>

      <vmw:Config ovf:required="false" vmw:key="tools.toolsUpgradePolicy" vmw:value="manual"/>

      <vmw:ExtraConfig ovf:required="false" vmw:key="nvram" vmw:value="SmallerBaseBuild.nvram"/>

    </VirtualHardwareSection>

  </VirtualSystem>

</Envelope>