I have been having the same issue for the past few weeks. Tried few of the following solutions to have it working,
A. Turning of firewall.
B. Disabling any extensions, if enabled.
C. Clearing of cache, cookies, history, etc.
D. Turning off or adding an exception for opera browser in anti-virus, if available.
E. Updating the browser to i=the latest version.
But still the same result. It just shows the "connecting..." and nothing else happens.
Someone please help with a viable solution.