I cannot install jetpack 4.3 on xaiver

I downloaded all packages of jetpack.
I installed xaiver in install mode(first I pressed force recovery button then I pressed power button)
ubuntu 18.04 and installing with VM

but I get the following error messages

03:28:21 INFO : Flash Jetson AGX Xavier : [ 15711.7841 ] USB communication failed.Check if device is in recovery
03:28:21 INFO : Flash Jetson AGX Xavier : [ 15711.7892 ]
03:28:21 INFO : Flash Jetson AGX Xavier : [ 15711.7903 ] tegradevflash_v2 --iscpubl
03:28:21 INFO : Flash Jetson AGX Xavier : [ 15711.7981 ] Cannot Open USB
03:28:21 INFO : Flash Jetson AGX Xavier : [ 15711.8051 ]
03:28:21 INFO : Flash Jetson AGX Xavier : Error: None of the bootloaders are running on device. Check the UART log.
03:28:21 INFO : Flash Jetson AGX Xavier : Reading board information failed.
03:28:21 INFO : Flash Jetson AGX Xavier : exit status 1
03:28:21 INFO : Flash Jetson AGX Xavier : [ Component Install Finished with Error ]
03:28:21 INFO : Flash Jetson AGX Xavier : [ 320.73 MB used. Disk Avail: 48.91 GB ]
03:28:21 INFO : Flash Jetson AGX Xavier : [ NV_L4T_FLASH_XAVIER_WITH_OS_IMAGE_COMP Install took 4h21m54s ]
03:28:21 ERROR : Flash Jetson AGX Xavier : Run commands failed at step Install: command sudo ./flash.sh jetson-xavier mmcblk0p1 finished with error
03:28:21 INFO : Flash Jetson AGX Xavier :
03:28:21 ERROR : Flash Jetson AGX Xavier : command terminated with error
03:28:21 ERROR : Flash Jetson AGX Xavier : install ‘Flash Jetson AGX Xavier’ failure, command < cd ‘/home/a/nvidia/nvidia_sdk/JetPack_4.3_Linux_P2888’ ; ‘/opt/nvidia/sdkmanager/resources/app/output/installUtils/adapter’ -a=‘install’ -c=‘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’ -i=‘NV_L4T_FLASH_XAVIER_WITH_OS_IMAGE_COMP’ -v=‘32.3’ -l=’/home/a/nvidia/nvidia_sdk/JetPack_4.3_Linux_P2888’ -L=’/home/a/.nvsdkm/logs/JetPack_4.3_Linux’ -p=‘1697’ -t=‘P2888’ -e=‘undefined’ > terminated with error
03:28:21 INFO : Device Mode Host Setup in Target SDK : install ‘Device Mode Host Setup in Target SDK’ Skipped
03:28:21 INFO : DateTime Target Setup : install ‘DateTime Target Setup’ Skipped
03:28:21 INFO : CUDA Toolkit for L4T : install ‘CUDA Toolkit for L4T’ Skipped
03:28:21 INFO : cuDNN on Target : install ‘cuDNN on Target’ Skipped
03:28:21 INFO : TensorRT on Target : install ‘TensorRT on Target’ Skipped
03:28:21 INFO : OpenCV on Target : install ‘OpenCV on Target’ Skipped
03:28:21 INFO : VisionWorks on Target : install ‘VisionWorks on Target’ Skipped
03:28:21 INFO : VPI : install ‘VPI’ Skipped
03:28:21 INFO : NVIDIA Container Runtime with Docker integration (Beta) : install ‘NVIDIA Container Runtime with Docker integration (Beta)’ Skipped
03:28:21 INFO : Multimedia API : install ‘Multimedia API’ Skipped
03:28:22 INFO : All done!

A regular install of Ubuntu on the host PC is recommended. VMs are not supported. Some people do get VMs to work, but usually they have to force USB to be owned entirely by the VM. What happens is that the USB disconnects and reconnects during a flash, and the VM loses the connection. In a similar way, after flash is done, package install tends to try to use the virtual wired ethernet over USB, and that too must be passed through to the VM without the parent operating system getting in the way.

Thank you. I tried it from the host computer and installed ubuntu 18.04.