ABX00003 Debug issue

Hi Arduino team,

Thank you for your support.

I bought an Arduino Zero (ABX00003) about two weeks ago and started using it two days ago.
It worked fine at the time, but yesterday it stopped working (Only second time use) when I used the same software.
(Using Arduino IDE 2.3.5)
When I try to upload, I get the following message:

Open On-Chip Debugger 0.10.0+dev-gf0767a31 (2018-06-11-13:36)
Licensed under GNU GPL v2
For bug reports, read

debug_level: 0
none separate
adapter speed: 400 kHz
cortex_m reset_config sysresetreq
target halted due to debug-request, current mode: Thread
xPSR: 0x60000000 pc: 0x0086940c msp: 0x005e940c
** Programming Started **
auto erase enabled
wrote 11776 bytes from file C:\Users\NISSYO-69\AppData\Local\arduino\sketches\7A50FEEA2E65E8D55FDF94E67921757B/BlinkLED.ino.bin in 1.281644s (8.973 KiB/s)
** Programming Finished **
** Verify Started **
verified 11660 bytes in 0.983342s (11.580 KiB/s)
** Verified OK **
** Resetting Target **
Error: at91samd21g18.cpu -- clearing lockup after double fault
target halted due to debug-request, current mode: Handler HardFault
xPSR: 0x60000003 pc: 0xfffffffe msp: 0x005e93e8
shutdown command invoked

Problem is,
Both the "ON" LED and the "DEBUG" LED are lit, but I can't upload a sketch file.

Can be flash, Reset or restore?
I thought data issue, though.

Can you give some advice?

Thank you so much.

Kind Regards,
Takashi
T4815857