Fully power cycling and leaving the unit off for 10 minutes would be my first suggestion if that has not already been done.
Try that, if you havent already, then run a camera test. System Test > Panel Test > Camera, does it pass or fail?
If its not passing, or taking images, it may be hardware failure. I’m not seeing an active account with Surety, so I’m a bit limited in what I can see, or assist with directly. You may want to reach out to your current provider if you have one.