On this page runs an extension which supports injection of Vimium C, but its ID is not in the allow list. Allow it now.
Your browser does not run web extensions like Vimium / Vimium C on certain pages, usually for security reasons.
Unless your browser's developers change their policy, then unfortunately it is not possible to make Vimium / Vimium C (or any other web extension, for that matter) work on this page.
Besides, Opera has a special security option preventing extensions (like Vimium C) from working on some search result pages. And you can turn it off manually, by enabling "Allow access to search page results" on Opera's extension manager.
If Vimium C is newly installed, please refresh to get it work.Retry (Z).
Configure more on the options page. Version .