Error message

[jbcosman]

My student says this error message is popping up:  error on the notebook communication until teacher links the website

What do I need to do to fix it?  Is there something I did wrong in uploading the assignment?

This is a google slides assignment that has several imbedded videos from youtube.  Do I need do something extra for the videos to work while I'm creating the assignment?

I have no idea, I'm a newbie.

Thanks!