Jetpack 5.0.2 NX Image file flashing is not working

Please try with SDK manager to flash your device.
For JetPack 5.0.2, please have a host PC with Ubuntu 20.04.

The background is due to the QSPI image, you can refer to Where to Download JetPack 5.x QSPI image on Jetson Xavier NX Developer Kit - Jetson & Embedded Systems / Jetson Xavier NX - NVIDIA Developer Forums