which extension is this?

murdocklawless

the registiration, welcome and info windows on the left side?

datlechin

murdocklawless That's Welcome box https://extiverse.com/extension/justoverclock/flarum-ext-welcomebox

murdocklawless

girefko

You can also run a check on a forum that you like and find out what Extensions they are using through here: https://lab.migratetoflarum.com/

murdocklawless

girefko saying this;

This Flarum is accepting connections via multiple urls which will result in an invalid config.url value being used for some of them. This will also impact your search engine ranking by creating duplicate content. Setup redirects so only the url defined in your config.php (https://domain.com) can be used to access the forum to fix it.

how can I fix this?

Hari

murdocklawless its regarding the WWW redirection i think, decide what you need with www or without www and then configure your NGINX or apache (htacess) and also flarum config files.

i don't know how to configure but thought of answering your question