I just received my license...but I wish it had been clearer on the automatic responses during the application process. I feel that the generic response about the FBI was unnecessary and I did not complete a background check, even though it told be to. Are you in the state of IL now, or did you submit from out of state? I would advise going to one of the digital fingerprint places if possible. In Colorado, where I was living at the time, only two places were open in the state, so I waited until moving to IL to do it. It was a bit of a mess.
One suggestion, you could try applying for a temporary Covid license in the meantime.
Best of luck. I'm sorry you're in this mess, but know you're not alone in frustrations.