I’ve had issues with Opera VPN not connecting when the browser was first opened. As their service is gotten from SurfEasy Inc., your issues with connectivity would require support from either Opera or SurfEasy, or both, to resolve.
As the service is touted as being free, the only real support for your vpn issue would be from Opera.
Something to consider about Opera’s version of VPN service: http://www.smh.com.au/technology/gadgets-on-the-go/opera-browsers-free-builtin-vpn-vulnerable-to-major-security-flaw-20160422-gocmmo.html
[EDIT:] If you’ve got nested virtualization option available, turn it on and reboot: https://forum.avast.com/index.php?topic=201797.0 Appears here that issue affects some or all Chrome browsers.