Thank you for the info!
Yes the ROM works fine so that is great. Just thought if someone else also gets stuck with this issue that they might solve it by retrying to run the updater a few times after exiting and entering the fastboot again.
Was not sure where else to post this so hope here is...
Just wanted to post this in case of anyone else having some issues updating their Xiaomi device to MIUI 13 (I have an Mi 11 Ultra).
When I tried installing the new MIUI 13 fastboot update I got the following error in cmd:
Sending sparse 'super' 7/9 (781156 KB) FAILED (Error reading...