update via ota encryption is missing


Jul 21, 2016
Hi All.
Im trying to update to the latest developer rom.
The Updater is telling me that my file system is encrypted and the twrp should decrypt it .
When i go to recovery I can't find any option to decrypt my storage and my internal storage is all with 0 size.
I tried in terminal ( of twrp) to decrypt as well and it tells me that the twrp doesn't support decrpty but im using the official twrp from this site.

What am i doing wrong?