I have this issue in at least a couple of machines. These are the specs of one of them:

I don't have the exact errors (log) right now as I have downgraded it. But, executing it from CLI, I do remember a bunch of complaints regarding GPU.
In my case, the app simply didn't show. It does execute because the tray icon is there, although not visible (empty space). But I can right click on it and get the options and can quit it from there.

I did the install and it worked for me. No reboot was necessary.

Having the same issue. I opened a thread on the forums. https://discuss.getsol.us/d/5093-vpn-openvpn-not-connecting-anymore