virtualization – Android Studio on VirtualBox

I want to create applications in React Native and I have problems on my PC that force me to use a virtual machine to code. I’ve chosen Oracle VM VirtualBox with Ubuntu for my virtual machine.
I’m using Android Studio to test my application on an Android emulator. Unfortunately, when I select an image system, I get the following error:
“Your CPU does not support required deatures (VT-x or SVM)”.
So, I tried to activate the option “Enable VT-x/AMD” in my machine settings, but the box is disabled.

My “Virtualization Technology” is enabled.
My CPU is: Intel Core i5 8300H @ 2.30GHz.