wblz When extension is installed, this suggestion appears in a dark orange background: Package http-interop/http-middleware is abandoned, you should avoid using it. Use http-interop/http-server-middleware instead.
marlon luceos Thanks! I encountered the same issue while installing flarum from scratch, so now I'm just ignoring it. hope nothing serious though
ExZiByte It's not only when an extension is installed its everytime composer references the composer.json file in flarum including during the original install of flarum I have been ignoring it.