Cubase Pro 10.5.12 doesn't get any audio input

Hi there
I purchased the update from cubase pro 10 to 10.5.12 a few days ago.
In the new version, Cubase (Cubase10.5.12) doesn’t get any audio input (although everything is set up properly in the F4 window).
In the previous version (Cubase 10.0.40) everything works alright.

Im using:
macOS Mojave
Fireface 800

Hi and welcome,

Make sure Cubase has enabled Mic in the System Preferences, please.
Open macOS System Preferences > Security & Privacy > Privacy > Microphone. Enable Cubase here.

Btw, there is Cubase 10.5.20 update available.