Usually "package installer" would be Linux, though it is still rather vague - you mean dpkg, apt, rpm or any of half a dozen others? Which distro, which desktop, etc.?
Most likely it is looking for an appropriate version of the chromium media codecs package (whatever name that has on your system; often something like codecs-chromium-extra). Though with the lack of information, who knows?
@leocg said in Tags in bookmarks:
@chrisofbristol In a section that shows the member best posts.
LOL! What about if you asked me which was my fastest car and I replied that I don't have a car?
I'm afraid that another reason for giving up on Opera is your patronising posts and your pedantry. What is your motivation for posting here - apart from trying to make yourself look clever at the expense of an ordinary user? I think you are enjoying being a big fish in a small pool - and you have just lost one more potential user.