I confirm the existence of such a problem. I was able to solve it using another program to unpack the archive. But unfortunately I also confirm the problem that the user before you wrote about. On Beta 2 the tool really doesn't work. In addition, the phone has stopped booting. Point 6 to restore the native files does not help to solve the problem. I'm not sure if I'm doing it right, but I'm trying to flash the firmware to rollback to oos 11, but I have no way to get the phone into EDL mode. Please tell me the best way for me to repair the phone?
I managed to flash the phone to OOS 11 (downgrade) via EDL. Instead of plugging the phone into the laptop, I plugged it into the charger and waited for some kind of notification that I went into EDL mode. My bad. It's fine now. Will switch to OOS 12 in the future when they fix the bugs. Everyone kept crashing the app when I tried to download something. The only thing I could download was Chrome.I tried when I had a chance for a cpl days updating drivers, etc and then running toolbox..but it never wld root my 9pro/OB2.. Finally I just knew I'd prob have to format data and try and that was what got it to work for me.. I was thinking about going back to OS11.
As far as not being able to get into edl, if u can't, u might be able to take rollback rom and extract files and fastboot flash. Or latest version(of11) and do so. If ur phone isn't booting maybe u can use BL mode to go into recovery and wipe(to be able to boot again) and use rollback rom(and local update) to go back. No matter u will be wiped. Or you shld somehow be able to get it into edl long enough to msm.