Won't Connect to Internet After Connecting to OpenVPN or Custom Proxychains

Hi guys!

I'm new to Kali Linux and I'm currently taking a course on it. But I'm having a problem when I'm trying to setup my own custom Proxychain or connecting to openVPN. When I try to get on the internet afterwards it will not connect. I tried to disable the firewall using ufw disable but it didn´t work.

Did anyone have the same problem?

Thanks in advance!