I configured HTTPS with a self-signed certificate However, ThingWorx has an SSL error. Access to Windchill works fine (https: // <hostID> / Windchill) However, ThingWorx Navigate allows you to log in but an error occurs when importing 3D data. To find out if this is a problem with self-signed certificates, we are looking for a guide to getting SSL certificates for free. I received a Let's Encrypt recommendation from a previous question. But I'm having difficulty with the way I use it on Windows. I found that I had to leave ports 80 and 443 blank, but this is already in use by Windchill.