I purchased an already modded new 3ds xl back in 2019. It has Luma3Ds v10.0.1 configuration. I accidently went into the store online and updated firmware. Now getting the ARM11 error when I turn on the 3DS. I tried to find solution on my own reading many threads. But, most mentioned update to 10.2.1 on SD card. Issue for me is, my modded 3DS works without a SD card, or at least I never used. Is there a simple fix or restore back to original settings?