Need help with a embedded project (SAMD21 + jlink)

Hello,
Before buying a CLion license, I'm trying to get my project up and running, but I'm having trouble due to a lack of knowledge.

my OS : windows 10 (64bits)
my peripheral: SAMD21G18A (adafruit feather M0 card)
my jtag probe: segger jlink base

I downloaded the ARM string “gcc-arm-none-eabi-10.3-2021.10-win32.exe”.

And I want to use the JLINK GDB.

Today I still get the message “Truncated register 8 in remote ‘g’ packet” when I run the debug.

Could someone give me some advice or explain?

Thanks in advance