SanDisk Ultra+ SSD Manual Firmware update version X2316RL

By the way, I’m using Linux, so I have a MBR boot partition. Is that the problem? I suspect that this firmware installer can’t work with MBR, but only with an EFI boot partition.

The Sandisk Utlra Plus SSD is working fine on my computer (I’ve installed Linux on it), but I just can’t update this firmware! Could anyone help me out?