So I didn't have any issues. I downloaded the firmware from the link supplied above. Extracted. Under Config/Image Contorl I went down to Image settings, selected boot, clicked Choose file and selected the boot image. Clicked download via browser. Did the same for the image(selected image 1 from image for transfer). Both were quick to upload then took a few minutes to successfully apply. I clicked reboot! at the bottom and after it rebooted, the webUI came back up.