@htdinh
Welcome to the Canvas Community!!!
This comes directly from the guides:
The Black Warning Icon [1] notifies you that the final score does not include one of the assignment groups because the group has zero points possible (the warning will tell you which assignment group is affected). This icon only displays in the total column related to assignment group errors.
You can correct the assignment group warnings by making sure a weighted assignment group has an assignment worth more than zero points, or, if an assignment is supposed to have zero points, adding another assignment with more than zero points to the assignment group.
The Red Warning Icon [2] notifies you that the entered grade is not supported in the grading scheme. Canvas will also display an invalid grade warning message when an invalid grade is entered.
https://community.canvaslms.com/docs/DOC-16560-4152813652
Robbie
This discussion post is outdated and has been archived. Please use the Community question forums and official documentation for the most current and accurate information.