Hello,
Problem when I want upgrade this #023 with a dirty flash, I've this error message.
I must do a full wipe ?
When I tried installing, I had similar issues where I was getting mount errors for /system, /cache, etc.
No idea if this will make a difference for you or not, however I wonder what size sd card you're using. Whenever I try using my 128GB San Disk, I have trouble flashing ROMs on both my HTC 10 and ASUS TF701T. When I use my 16GB Samsung sd card, I have no issues. I have a 128GB card for each device, so I am not using the same one on both. Maybe it's the format of the sd card as my 16GB is FAT, and my 128GB cards are not. My HTC 10 is on 7.0 and I'm running this 7.1.2 on my TF701T.
Like I said, this may not make a difference for you, I just know it made a difference for me. Some people might say it should not make a difference, but it does for me. Maybe try a smaller sd card size formatted as FAT???
ETA: and you'll still need a full wipe according to the directions. When I did mine, I started it from the power+vol down method instead of going in directly through TWRP. This method still took me into TWRP, just a different route which ended up working out for me.