Help with soft briked after Xposed

I hope I'm in the right place

I have zenfone2 with LRX21V.WW-ASUS_Z00A-2.20.40.178_20160330_890_user
I rooted the device following these instructions:
Download the 1 Click Root Tool for Zenfone 2 from
Unzip and connect your phone to PC
Run CheckBeforeAction.bat .... You will get confirmation to proceed to next step
Now run Root_zenfone.bat
Your Device will be rooted automatically

Updated Supersu binary ...

Installed Busybox

Than tried to install Xposed Framework following the instructions here:
Download Xposed Installer from http://ift.tt/1V36cAV
Connect your zenfone 2 with USB (USB debugging enabled)
Extract the downloaded folder and launch InstallXposedFramework.bat (phone will reboot)
Now launch InstallXposedInstaller.bat to install Xposed apk on your phone. Enjoy Xposed on your zenfone 2

My device rebooted and stayed in the ASUS screen

I tried to sideload stock rom (UL-Z00A-WW-2.20.40.174-user) in recovary but it fails saying:
"Can't install this package ( 3 10 09:43:34 CST 2016) over newer build ( 3 30 14:23:11 CST 2016)
E: Error in /sideload/package.zip
(status 7)

installation aborted"

any advice how to overcome the problem?

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