vbox Failed to open/create the internal network

Hello Experts,

After rebuilding world + kernel (FreeBSD 13.2-STABLE c9f2ffe5f) and updating ports, I cannot start a Win7 guest in virtualbox, unless network adapters are disabled.

Here is the relevant part of VBox.log:
Code:
00:00:00.661283 VMSetError: /usr/ports/emulators/virtualbox-ose/work/VirtualBox-6.1.36/src/VBox/Devices/Network/DrvIntNet.cpp(1765) int drvR3IntNetConstruct(PPDMDRVINS, PCFGMNODE, uint32_t); rc=VERR_SUPDRV_COMPONENT_NOT_FOUND
00:00:00.661291 VMSetError: Failed to open/create the internal network 'HostInterfaceNetworking-em0'
00:00:00.661320 VMSetError: /usr/ports/emulators/virtualbox-ose/work/VirtualBox-6.1.36/src/VBox/Devices/Network/DevVirtioNet.cpp(2331) int vnetR3Construct(PPDMDEVINS, int, PCFGMNODE); rc=VERR_SUPDRV_COMPONENT_NOT_FOUND
00:00:00.661323 VMSetError: Failed to attach the network LUN
00:00:00.681884 ERROR [COM]: aRC=NS_ERROR_FAILURE (0x80004005) aIID={872da645-4a9b-1727-bee2-5585105b9eed} aComponent={ConsoleWrap} aText={Failed to open/create the internal network 'HostInterfaceNetworking-em0' (VERR_SUPDRV_COMPONENT_NOT_FOUND).
00:00:00.697903 Power up failed (vrc=VERR_SUPDRV_COMPONENT_NOT_FOUND, rc=NS_ERROR_FAILURE (0X80004005))

In the file win7pro64.vbox I have:
Code:
      <Network>
        <Adapter slot="0" enabled="true" MACAddress="0800279A64DD" cable="true" type="virtio">
          <DisabledModes>
            <InternalNetwork name="intnet"/>
            <NATNetwork name="NatNetwork"/>
          </DisabledModes>
          <BridgedInterface name="em0"/>
        </Adapter>
        <Adapter slot="1" MACAddress="080027FE3DAE" cable="true" type="82540EM">
          <DisabledModes>
            <InternalNetwork name="intnet"/>
            <NATNetwork name="NatNetwork"/>
          </DisabledModes>
        </Adapter>
        <Adapter slot="2" MACAddress="0800273B9222" cable="true" type="virtio">
          <DisabledModes>
            <BridgedInterface name="em0"/>
            <InternalNetwork name="intnet"/>
            <NATNetwork name="NatNetwork"/>
          </DisabledModes>
        </Adapter>
        <Adapter slot="3" MACAddress="0800274EC8F9" cable="true" type="82540EM"/>
        <Adapter slot="4" MACAddress="080027C84097" cable="true" type="82540EM"/>
        <Adapter slot="5" MACAddress="080027E7269E" cable="true" type="82540EM"/>
        <Adapter slot="6" MACAddress="080027E28D4F" cable="true" type="82540EM"/>
        <Adapter slot="7" MACAddress="080027952183" cable="true" type="82540EM"/>
      </Network>

Enabling internal network doesn't seem to make a difference:

Code:
      <Network>
        <Adapter slot="0" enabled="true" MACAddress="0800279A64DD" cable="true" type="virtio">
          <DisabledModes>
            <InternalNetwork name="intnet"/>
            <NATNetwork name="NatNetwork"/>
          </DisabledModes>
          <BridgedInterface name="em0"/>
        </Adapter>
        <Adapter slot="1" enabled="true" MACAddress="080027FE3DAE" cable="true" type="virtio">
          <DisabledModes>
            <NATNetwork name="NatNetwork"/>
          </DisabledModes>
          <InternalNetwork name="intnet"/>
        </Adapter>
        <Adapter slot="2" MACAddress="0800273B9222" cable="true" type="virtio">
          <DisabledModes>
            <BridgedInterface name="em0"/>
            <InternalNetwork name="intnet"/>
            <NATNetwork name="NatNetwork"/>
          </DisabledModes>
        </Adapter>
        <Adapter slot="3" MACAddress="0800274EC8F9" cable="true" type="82540EM"/>
        <Adapter slot="4" MACAddress="080027C84097" cable="true" type="82540EM"/>
        <Adapter slot="5" MACAddress="080027E7269E" cable="true" type="82540EM"/>
        <Adapter slot="6" MACAddress="080027E28D4F" cable="true" type="82540EM"/>
        <Adapter slot="7" MACAddress="080027952183" cable="true" type="82540EM"/>
      </Network>

Would you please advise?
 
Migrated the same guest to another host which I updated a few weeks ago (FreeBSD 13.2-STABLE #0 44a608827) which has virtualbox-ose-6.1.32_3 and virtualbox-ose-kmod-6.1.32_1. The guest started up normally and networking is functional.
 
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