I can't see my website on a new tab

Problem description:
while making a test for a website, I found a bug, it consist on the fact that we can’t see the evolution of our code on a new tab ( i used python and html ). There was this message :
This site cannot provide a secure connection
{projectname}.{mymail}.repl.co sent an incorrect response. ERR_SSL_PROTOCOL_ERROR

(sorry for my bad english)