Health Control Form For Entry Into Spain

I am hoping that someone who has had direct experience with this form-- that is mandated by the Spanish government-- can help answer my two questions.

(1) Did you have any issues when accessing the site? I received a warning that the "certification" had expired and that the site was not secure. I thought perhaps it was my firewall/security software doing its job, but when I continued to attempt to enter the site, I was prompted to give my password. I did not proceed. This occurred when attempting to access the form directly from Tauck's digital instructions, as well as from my search on the internet. I suspect that it was merely my security software doing its job. Did anyone else have this experience?

(2) Once on the site, can the form be completed once for all individuals traveling together? My husband does not have a cell phone nor an e-mail address. If each traveler must complete a form, I am concerned I will get an error message saying "this e-mail address/cell phone number has already been used."

I prefer not to disturb Tauck with this since they certainly have better things to assist their customers with. Any feedback from those with experience with this form will be greatly appreciated. Thanks in advance for assistance!