SDK Manager on Raspberry Pi 4b running Ubuntu

Hello.
I am new to the NVIDIA Jetson world. I have a Jetson TX1 that I need to flash with Jetpack. However, I do not have any Ubuntu machines. I have a Raspberry Pi 4B with Ubuntu (x64) running on it. I have tried to install the SDK manager on it, with no success.
Ways Tried

Ways tried on the Jetson itself

I know how to put the Jetson TX1 into recovery mode, but that is about all I know. Can someone please help me figure this out and/or find a different device that will work?
Thanks!

Hi ratack0,

Please find a desktop Ubuntu 18.04 with x86 PC to get device reflash successfully.

Thanks

Hello. Thank you for responding so quickly. I will do my best to find an Ubuntu 18.04 PC.