@loboturbo
Hi, I read from notes that we need android 9.0 and installed the official release from India rom sites.
The process still did not work for me when I used the android 9 version of stock MIUI rom and I would get the same result as you.

Eventually what worked for me:

used TWRP Flashed Android rom version 9.9.3 (I read that the maintainer had tested on 9.9.3) Then used the latest UBports installer version 0.9.x beta After repeated failure to install from the stable channel I chose to install the RC version and that worked

After installation I tried to update the OS from phone settings using the stable channel but that would not boot and I had to reinstall from RC channel again using the UBports installer.

As of now I'm running the RC channel and it seems to be working fine.
Sometimes the swipe from right to close the applications starts misbehaving. However lock and unlock of the phone sets it right.

Rest of the features at least seem ok.
I am able to browse, make calls and use phone messages.