This is the most common point of failure. You do not log in with just a phone number. You need a specific provided by your institute.
If you want, I can:
Classplus is an educational platform designed with high-security measures to protect the intellectual property of educators. Because of these protections, there is no official way to download videos as local files (like MP4s) to your device's gallery or hard drive. install download classplus videos
If you're having trouble with a specific error message, I can help you troubleshoot. Just let me know: Are you getting a or a specific error code ? Are you on Android, iOS, or Windows ? This is the most common point of failure