Your secure server is borked. Looks like either your files got wiped or they screwed up the configuration path. Pathing issues are the most likely culprit. Looking at
https://puroconjunto.com/merchant.mv yields the message that /cgi-bin/miva/merchant.mv cannot be found. Perhaps someone has mistaken miva for a cgi-bin script, or set the server paths incorrectly so it's looking for the data in the wrong place. Looking along the normal /Merchant2/merchant.mv retrieves a 404. 5'll get you 10 that's the source of your problem.