Whonix 15 - shared clipboard and drag'n'drop not working

after I’ve updated from version 14 to 15, shared clipboard and drag’n’drop to/from host don’t work anymore.
I rebooted several times, turning off and on again the features in Oracle VM settings, but nothing.
Host is Windows 10 Pro 64 bit, guest is Whonix XFCE.

Please help.

Thank you.

I solved by updating the guest additions:
sudo apt-get update && sudo apt-get install -y virtualbox-guest-*