Check if SSD is frozen. If it is, try suspend/wake or hotplug SSD. You might need a Linux ISO with suitable kernel:

# echo -n mem > /sys/power/state

# hdparm -I /dev/sdX | grep frozen
       not     frozen <-------------------- This drive is not frozen, continue.

If SSD is still frozen, reseat SSD power connector (be sure hotplug is enabled) or try the following.:

# readlink /sys/block/sda
../devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0/0:0:0:0/block/sda

# echo 1 > /sys/block/sda/device/delete
# echo "- - -" > /sys/class/scsi_host/host0/scan

Set a User Password (this password is cleared too, the exact choice does not matter).

# hdparm --user-master u --security-set-pass fj#sz2A /dev/sdX

Issue the ATA Secure Erase command:

# hdparm --user-master u --security-erase fj#sz2A /dev/sdX