Janet, I'm experiencing 404's when clicking on links embedded in posts.
It wants to go to Thor Forums first and pass the rest as a parameter. It's failing. If I bypass this and 'Copy Link'. It works fine. I think you should stop trying to wrap URLs in your warning page about leaving the forum.
Breaks:
https://www.amazon.com/Camco-Support...7150025&sr=8-1
Works if you copy/paste in new tab:
amazon.com/Camco-Support-Folding-Travel-51490/dp/B000EDUUJ4/ref=sr_1_1?keywords=rv+ladder+rack&qid=1577150025& sr=8-1