How to cancel/edit applab game after submission

I need to make a minor edit, I just submitted it this morning and it says the following while trying to upload a new build “Cannot modify release channel… may not be modified while undergoing initial review”, and the cancel button is grayed out at the Meta data page with a similar message.

Is the app being scanned briefly before I am allowed to cancel the submission, or cannot it not be edited or cancelled until it waits for a full review?