It’s a bug with your preferences.
Start cubase in safe mode and it will probably function fine.
It’s a shame how manu bugs there are that get tied to preferences.
I’ve had to trash my settings multiple times over to fix bugs like this and more.
No, you don’t have to use the Safe Mode every time. Something was wrong with your preferences. By disabling it, Cubase started a new factory preferences. Now you are working on this factory preferences.
Yeah its the biggest bug inside cubase to date.
A bug that allows other bugs to embed inside your preferences.
You have to then trash everything and start from scratch to remove them, before having them randmly appear again and having to do it all over again.
Can’t tell you the amount of time i’ve spent on re-doing my preferences and other settings from scratch.
I had this issue as well. In fact, any processes such as normalize also did not work. What fixed it for me was changing the project folder location. In the Steinberg Hub, make sure the “Use Default Location” project folder is set to any folder outside of the Cubase program file folder. For example:
This path causes the issue: C:\Program Files\Steinberg\Cubase 10.5\Cubase Projects
This path works as normal: C:\Program Files\Steinberg\Cubase Projects