I don't know the reason in your case, but for a few weeks ending today, I wouldn't have been able to either, due to a long-standing issue with Opera and libffmp

I don't know the reason in your case, but for a few weeks ending today, I wouldn't have been able to either, due to a long-standing issue with Opera and libffmpeg.so. Today Opera updated itself and everything now works fine, at least until the problem recurs. Maybe you have a similar problem?