looks like you're in the same case as I was ! Go to a website like http://samfirms.com/ , find your device and go through the list firmwares, find your flag and pay attention to what the end of the "Version" coloumn (has to be FDBV). If it's not just go further in the list. You can just flash via odin again and the rom installer will work afterwards
S10 TWRP doesn't support /data encryption so in not a matter of rom support or not for /data encryption.