Should have said so from the start, I assumed you used the latest build (which is Weekly 9.3.28). I even included the ROM version in the flashable ZIP's name...
Here's a ZIP for V10.2.4.0:
https://www.mediafire.com/file/koni58v8crfv7tt/RoundCornerTest_HM5A_V10.2.4.0.flashable.zip/file
It probably won't fix the issue, but you will be able to boot.
Now that I know how to reproduce it, I'll look into it.
EDIT: Looks like an official MIUI bug...
EDIT2: I managed to overcome this MIUI issue that
@pajser92 mentioned, but you said...
So unless you have more specific information, can't help with that.