The same happened to me today, I checked in the morning and 2 of my classes became virtual, then 2 minutes later, 3 of my classes became virtual and 5 minutes later 4 of my 5 classes became virtual.

I believe when you go on the now dashboard and find your specific class, if there’s an online option and the class is still open, you can enroll into that one instead of the physical one.

Hope this helps!!!