Redmi Buds 6 Play can't update firmware

I just received a pair of Redmi Buds 6 Play and connected them to my Android phone. The connection was really fast, and a window automatically suggested which app to download.

In this app, I pressed the forward button to agree the terms, selected my country, and saw a message saying that a firmware update was pending. I followed the procedure, but in the end, I was redirected to the app's home screen without the update being downloaded or installed.

Without this update, there's no ANC (active noise cancellation). I really want to try it since so far, the sound of these little buds seems pretty good for the price.

I tried uninstalling the app and unpairing the earbuds, but the problem persists; the update prompt comes up again but the procedure leads to nothing.

Anyone else experienced the same issue?