Full disclosure: nobody on Titan Network is responsible for the Tequila launcher. That's at savecoh.com, and as you see when you visit there, the website is offline.
500 Errors on Tequila mean the same thing as a 500 error on a web browser - Internal Server Error. If the site is down, Tequila will not work, simple as that. Getting another copy of Tequila won't change that outcome.