So I was using Betternet VPN on my PC a few days ago but today this message pops up whenever i try to run it. I tried google and the official website and couldn't really get anywhere. Any help?
The stack trace suggests it's crashing trying to read its own config file.
Given that you're trusting it with your data, and it's clearly not been fuzz tested, your best course would be to uninstall it and use OpenVPN instead.