You pasted a HTTPS address, but the server doesn&#x27;t answer to HTTPS (it is somewhat redundant when you use onion services anyway). The correct one is <a href="http:&#x2F;&#x2F;scihub22266oqcxt.onion&#x2F;" rel="nofollow">http:&#x2F;&#x2F;scihub22266oqcxt.onion&#x2F;</a>