Medical care in Mexico.

We and several friends are trying to sign up, but part way through get messages that vary, from try later to invalid code. I have tried several browsers. Any suggestions other than keep trying? It's been a week so far......

Somehow I got registered, though I also had difficulties. Not sure if the system is overwhelmed or buggy. Sometimes it marks an error but in reality the data was accepted. They have a Facebook page where you can get help.
https://www.facebook.com/SSIMSSBIENESTAR/