Copy and paste not working in ubuntu in VirtualBox 6.1.2

I have gone to Settings → General → Advanced → Shared clipboard and changed to Bidirectional. Also did the same for Drag'n'Drop and changed it to Bidirectional too.

However I am still unable to copy and paste from my Windows 10 desktop to my VirtualBox 6.1.2 which runs on Ubuntu 20.04.

I basically want to be able to copy and paste from my Windows machine to my virtual Ubuntu machine.

I cannot comment but when I used Windows 8, VM 5 and Ubuntu 18, I also had issues, and had to apply fixes, like:

sudo apt update
sudo apt install build-essential dkms linux-headers-$(uname -r)
sudo apt install virtualbox-guest-x11
sudo VBoxClient --clipboard

Have you run these? Now I try with Win 10, VM 6, Ubuntu 20 like you, and nothing helps...

OK fixed also for me, but in another way:

Check for updates didnt show newer, hence I thought its the newest.

Installed VBox 6.1.8, replaced 6.0.22, clipboard works.