14569 mind the browser cache - the redirect is permanent, so the browser caches it. In order to check your domain from the point of new visitors, please use a different browser, clear your browsing history (select cached files and images) or simply use incognito/private browsing, as that bypasses the cache without messing with your existing browser data.
When I investigated it (when the domain was assumed to be linked properly from FreeFlarum’s perspective), the redirect chain was the following:
http://hub.54.lt => https://hub.54.lt <=> https://hub.54.lt
For some reason, the HTTPS version of the website has an infinite recursion of redirecting to itself, likely for the reasons that are described in more detail at the link I attached in my previous post. Right now, the 145hub.freeflarum.com hostname seems to function properly on my side (no redirect, forum loads at FreeFlarum’s domain, because it was unlinked).