The real issue is why you're still using Opera in 2017
I'm using opera cause of free VPN.
Ukraine blacklisted Russian social networks and couple of big websites that I use in may 2017 because of ongoing war.
Opera's VPN is the best free stuff I found to gain an access to blacklisted websites. I used to use FireFox and Chrome, and while Chrome is fine, there is nothing decent on FireFox to bypass blocks. So I have to use Opera, it's actually decent for my job, for the most part.
And apparently I can post as long as I'm quoting someone. But regular postin doesn't work.