Hi @CrystalMacias,
Do you just get a blank white screen when going to the grades area? If so, please make sure that both your browser and operating system are updated, as the most common cause of this that I've seen is outdated software (even if it worked yesterday, Canvas is always being updated and only officially supports the latest 2 versions of each major browser). You could also try to clear your browser cache, as there are times where something just gets unexpectedly "stuck" there and clearing it will allow things to work properly again.
Let us know if any of these suggestions work for you!
-Chris
