When I access to the conferences held by USENIX, such as OSDI, ATC, etc, the connector is grey, and cannot extract the information, which is available in the past versions. It works fine on other database, such as IEEE, ACM and Elsvier. BTW, I use chrome.

Here attach some pages for test:

https://www.usenix.org/conference/atc21/presentation/lin

https://www.usenix.org/conference/osdi20/presentation/li-jialin

https://www.usenix.org/conference/nsdi21/presentation/yang-juncheng

https://www.usenix.org/conference/osdi16/technical-sessions/presentation/rashmi