Unable to Upload PDF’s from iPad “My Computer” Option

I’m trying to upload documents using the “My Computer” option. I’m using an iPad. But when I click on it, all of my options are darkened, and I’m unable to choose anything to upload.
Choosing the “Google Drive” option is successful.
But, I would like to upload from iCloud. Anyone else with this issue or suggestions on how to solve?

Hi there, thanks for posting in the forum. Do you think you could attach a screenshot?