Error 255: can not install rom(s)

[SvenHee]

Hi Guys!

I've just started customising the phone after receiving it Friday.
I've unlocked the bootloader and installed twrp.

But now when I try to install a rom, I get error 255 and the installation is terminated immediately.

I found two mentions of this error:
- Unmount partitions in twrp
- make a change to a text file inside the roms zip file before installing it

I unmounted all partitions except sd card, did not work.
I looked inside the textfile in the zip but could not find the line mentiond in the post I found (it was for a different phone)

So now I'm stuck.
I do have the phone running the stock rom again and it may even be rooted (installing magisk worked) but have to check after putting the backup back.

Any thoughts?
I have tried two versions of aospExtended and cosmic

Edit:
Maybe the stuff is still encrypted?

 

[Adi5]

What twrp are you using?

 

[SvenHee]

Ah, maybe there is some sort of answer immediately, thanks for the quick reply.
I took it from this page from check yourscreen:
https://androidfilehost.com/?fid=889964283620777591

But now notice that ...9 is not the most recent.... I read 15 and 16 as 1.6

Will try again shortly.
Can I install the newer one through twrp or should I use fastboot?

EDIT: version 16 is working!

 

[neileshgiri]

Thanks so much