Thank you for posting in the PowerSchool Community for assistance!
One of our Community members faced a similar issue and the resolution was provided within this thread. I recommend reviewing the thread. If you are still unable to access the link after following the above instructions, I recommend contacting the school to confirm the link you are accessing is the correct link. If it is not, the school should be able to provide the correct link.
The ONLY way I was able to get it resolved was to call their support line 866-434-6276 and speak to someone directly. They sent me an updated link to get logged in and it worked this time... Link for New Student Registration https://secure.infosnap.com/family/gosnap.aspx?action=25778&culture=en
I recommend reaching out to the school to report this issue of "page is not available", and the school district should be able to provide you the updated link for registration.