Cain & Abel via OpenVPN [Poisoning & Sniffing LAB 10]

I’m trying to do the Poisoning & Sniffing LAB with Cain & Abel. I installed it on a Windows 10 VM according to these instructions. It seems to be working, but I never get the “Full-routing” status as shown in the course slides. In the passwords list I can see it’s picking up SMB, but not the other protocols. How to make Cain & Abel work when choosing the OpenVPN network adapter?