Stopped working. If the script is enabled RES will not load anything upon expanding the Twitter post. Using Firefox 113.0.2 (64-bit).

Hey, Landoretty. I got the same problem and found out to be from Firefox putting Twitter on the tracker list.

Try to disable Firefox Enhanced Tracking Protection "tracking content" and it should work just fine.

If it still doesn't work, try to check your Network to see what's blocking Twitter.