You only install the grader once, when you are ready to grade 1a. If you installed it, it's there. You can't install it again. It's already there.
If you're still having an issue, reply and include the error message and a screencap please.
You only install the grader once, when you are ready to grade 1a. If you installed it, it's there. You can't install it again. It's already there.
If you're still having an issue, reply and include the error message and a screencap please.