Error: 500 Internal Server Error

Sorry, the requested URL 'http://localhost/reader?url=https://www.rockymounttelegram.com/news/world/palestinians-give-bullet-that-killed-journalist-to-us-team/article_b4b20530-309c-57d3-a987-2e798c4557f0.html' caused an error:

Unhandled exception