I believe you can download the firmware for your TV, put it on a usb stick and use that to reflash it. That looks like there was some type of error or corruption during the update.
You need to contact Hisense support SERVICE@HISENSE-USA.COM for a link to download the firmware.
This thread has instructions on how to do the steps:
https://www.reddit.com/r/Hisense/comments/dnwvxl/how_do_i_update_from_usb/
You should cross-post this on the https://www.reddit.com/r/Hisense/ subreddit
What happens when you select reboot ?