Error when updating from Big Sur 11.1 to 11.3 (OpenCore)

Hello,

I tried updating from 11.1 to 11.3. During the update, OpenCore had an additional entry called Macintosh HD (My guess, this contains the update). When booting from it I got the following error -

Error I get when I select the Macintosh HD

However, when I tried to boot into the macOS entry, I was able to boot into macOS and got an error saying that the update couldn't be installed, though I can use the mac like regular. By default OpenCore selects Macintosh HD.

So my queries are -

1. How do I get the update up and running
2. If I can't update, how do I remove the Macintosh HD parition?