It seems the links in the Schoology App are not working.
There are two workarounds:
For Students
- Open Schoology in Safari(or any web browser) on your iPad.
 - Goto smhs.schoology.com
 - You may need to sign in with your Gmail account.
 - Go to your course and the links will work.
 
For Teachers,
- Copy the Zoom link (And any other links that are vital today) to your course updates, students are able to click on those inside the Schoology App.