I can no longer insert notes in my GradeBook sheet. I can insert notes in other tabs and I can copy and paste notes to the GradeBook tab. I can also delete notes in the GradeBook tab. However, when in the GradeBook tab, if I right click, I don't see the option to add a note.

The details say We're sorry, a server error occurred. Please wait a bit and try again. I've been having this problem for hours. I really would like ot be able to tell parents what is going on soon. This problem happens on all my gradebooks, even the ones where I didn't enter any data since the last report I generate.

I get this error one one of my sheets. What does it mean? I cannot send email reports from that sheet anymore.