It doesn't show any error just doesn't install?Thank you for your inputs.
I just want to report, I tried both updating to 9.1 and 10 using this, it proceeds to download and install, when it restarts my device and check the version, it still shows 188.8.131.52... I am trying to download the actual files this time but what could I be doing wrong here...
P.S another xda member was unable to install the packages, he was trying to go to emui 9 from 10 I guess, what he did was first upgrading to latest version of 10 then he was able to proceed with the rollback.
Maybe try first going to latest version of emui 9.0 if you're not already on the latest?